Merge pull request #7366 from guzzisti/install-md-wrapup

Overhaul of Install.md

INSTALL.md

@@ -1,347 +0,0 @@
-# Friendica Installation
-
-We've tried very hard to ensure that Friendica will run on commodity hosting
-platforms - such as those used to host Wordpress blogs and Drupal websites.
-But be aware that Friendica is more than a simple web application. It is a
-complex communications system which more closely resembles an email server than
-a web server. For reliability and performance, messages are delivered in the
-background and are queued for later delivery when sites are down. This kind of
-functionality requires a bit more of the host system than the typical blog.
-Not every PHP/MySQL hosting provider will be able to support Friendica. Many will.
-But please review the requirements and confirm these with your hosting provider
-prior to installation.
-
-Before you begin: Choose a domain name or subdomain name for your server.
-Put some thought into this - because changing it is currently not-supported.
-Things will break, and some of your friends may have difficulty communicating with you.
-We plan to address this limitation in a future release. Also decide if you wish
-to connect with members of the Diaspora network, as this will impact the
-installation requirements.
-
-Decide if you will use SSL and obtain an SSL cert. Communications with the
-Diaspora network MAY require both SSL AND an SSL cert signed by a CA which is
-recognized by major browsers. Friendica will work with self-signed certs but
-Diaspora communication may not. For best results, install your cert PRIOR to
-installing Friendica and when visiting your site for the initial installation in
-step 5, please use the https: link. (Use the http: or non-SSL link if your cert
-is self-signed).
-
-## 1. Requirements
-
-- Apache with mod-rewrite enabled and "Options All" so you can use a local .htaccess file
-- PHP 7+ (PHP 7.1+ recommended for performance and official support).
-	- PHP *command line* with `register_argc_argv = true` in php.ini
-	- curl, gd (with at least jpeg support), mysql, mbstring, xml, zip and openssl extensions
-	- Some form of email server or email gateway such that PHP mail() works
-	- The POSIX module of PHP needs to be activated (e.g. RHEL, CentOS have disabled it)
-	- Composer for a Git install
-
-- Mysql 5.6+ or an equivalent alternative for MySQL (MariaDB 10.0.5+, Percona Server etc.)
-- Ability to schedule jobs with cron (Linux/Mac) or Scheduled Tasks (Windows)
-- Installation into a top-level domain or sub-domain (without a directory/path 
-  component in the URL) is preferred. This is REQUIRED if you wish to communicate
-  with the Diaspora network.
-- For alternative server configurations (such as Nginx server and MariaDB database
-  engine), refer to the [Friendica wiki](https://github.com/friendica/friendica/wiki).
-
-This guide will walk you through the manual installation process of Friendica.
-If this is nothing for you, you might be interested in:
-* the Friendica Docker image (https://github.com/friendica/docker) or
-* how install Friendica with YunoHost (https://github.com/YunoHost-Apps/friendica_ynh).
-
-## 2. Install Friendica sources
-
-Unpack the Friendica files into the root of your web server document area.
-
-If you copy the directory tree to your webserver, make sure that you also copy 
-`.htaccess-dist` - as "dot" files are often hidden and aren't normally copied.
-
-OR
-
-Clone the friendica/friendica GitHub repository and import dependencies
-
-	git clone https://github.com/friendica/friendica -b master [web server folder]
-	cd [web server folder]
-	bin/composer.phar install --no-dev
-
-Make sure the folder view/smarty3 exists and is writable by the webserver user,
-in this case `www-data`
-
-    mkdir view/smarty3
-    chown www-data:www-data view/smarty3
-    chmod 775 view/smarty3
-
-Get the addons by going into your website folder.
-
-    cd mywebsite
-
-Clone the addon repository (separately):
-
-    git clone https://github.com/friendica/friendica-addons.git -b master addon
-
-If you want to use the development version of Friendica you can switch to the 
-develop branch in the repository by running
-
-    git checkout develop
-    bin/composer.phar install
-    cd addon
-    git checkout develop
-
-Please be aware that the develop branch is unstable.
-Exercise caution when pulling.
-If you encounter a bug, please let us know.
-
-Either way, if you use Apache, copy `.htaccess-dist` to `.htaccess` to enable 
-URL rewriting.
-
-## 3. Database
-
-Create an empty database and note the access details (hostname, username, password,
-database name).
-
-- Friendica needs the permission to create and delete fields and tables in its 
-  own database.
-- Please check the additional notes if running on MySQ 5.7.17 or newer
-
-## 4. Config 
-
-If you know in advance that it will be impossible for the web server to write or
-create files in the `config/` directory, please create an empty file called 
-`local.config.php` in it and make it writable by the web server.
-
-## 5a. Install Wizard
-
-Visit your website with a web browser and follow the instructions.
-Please note any error messages and correct these before continuing.
-
-If you are using SSL with a known signature authority (recommended), use the
-https: link to your website. If you are using a self-signed cert or no cert,
-use the http: link.
-
-If you need to specify a port for the connection to the database, you can do so
-in the host name setting for the database.
-
-## 5b. Manual install
-
-*If* the automated installation fails for any reason, please check the following:
-
-- `config/local.config.php` exists
-	- If not, copy `config/local-sample.config.php` to `config/local.config.php`
-	  and edit it with your settings.
-- Database is populated.
-	- If not, import the contents of `database.sql` with phpMyAdmin or the mysql
-	  command line tool.
-
-## 6. Register the admin account
-
-At this point visit your website again, and register your personal account with
-the same email as in the `config.admin_email` config value.
-Registration errors should all be recoverable automatically.
-
-If you get any *critical* failure at this point, it generally indicates the
-database was not installed correctly. You might wish to delete/rename 
-`config/local.config.php` to another name and drop all the database tables so
-that you can start fresh.
-
-## 7. Background tasks (IMPORTANT)
-
-Set up a cron job or scheduled task to run the worker once every 5-10 minutes to
-pick up the recent "public" postings of your friends. Example:
-
-	cd /base/directory; /path/to/php bin/worker.php
-
-Change "/base/directory", and "/path/to/php" as appropriate for your situation.
-
-If you are using a Linux server, run "crontab -e" and add a line like the one
-shown, substituting for your unique paths and settings:
-
-	*/10 * * * *	cd /home/myname/mywebsite; /usr/bin/php bin/worker.php
-
-You can generally find the location of PHP by executing "which php".
-If you have troubles with this section please contact your hosting provider for assistance.
-Friendica will not work correctly if you cannot perform this step.
-
-You should also be sure that `config.php_path` is set correctly, it should look
-like this: (changing it to the correct PHP location)
-
-	'config' => [
-    	'php_path' => '/usr/local/php56/bin/php',
-    ]
-
-Alternative: If you cannot use a cron job as described above, you can use the
-frontend worker and an external cron service to trigger the execution of the worker script.
-You can enable the frontend worker after the installation from the admin panel
-of your node and call:
- 
-	 https://example.com/worker
-
-with the service of your choice.
-
-## 8. (Recommended) Set up a backup plan
-
-Bad things will happen.
-Let there be a hardware failure, a corrupted database or whatever you can think of.
-So once the installation of your Friendica node is done, you should make yourself
-a backup plan.
-
-The most important file is the `config/local.config.php` file in the base directory.
-As it stores all your data, you should also have a recent dump of your Friendica
-database at hand, should you have to recover your node.
-
-## 9. (Optional) Reverse-proxying and HTTPS
-
-Friendica looks for some well-known HTTP headers indicating a reverse-proxy
-terminating an HTTPS connection.
-While the standard from RFC 7239 specifies the use of the `Forwaded` header.
-
-    Forwarded: for=192.0.2.1; proto=https; by=192.0.2.2
-
-Friendica also supports a number on non-standard headers in common use.
-
-    X-Forwarded-Proto: https
-
-    Front-End-Https: on
-
-    X-Forwarded-Ssl: on
-
-It is however preferable to use the standard approach if configuring a new server.
-
-## Troubleshooting
-
-### "System is currently unavailable. Please try again later"
-
-Check your database settings.
-It usually means your database could not be opened or accessed.
-If the database resides on the same machine, check that the database server name
-is "localhost".
-
-### 500 Internal Error
-
-This could be the result of one of our Apache directives not being supported by
-your version of Apache. Examine your apache server logs.
-You might remove the line "Options -Indexes" from the .htaccess file if you are
-using a Windows server as this has been known to cause problems.
-Also check your file permissions. Your website and all contents must generally
-be world-readable.
-
-It is likely that your web server reported the source of the problem in its error log files.
-Please review these system error logs to determine what caused the problem.
-Often this will need to be resolved with your hosting provider or (if self-hosted)
-your web server configuration.
-
-### 400 and 4xx "File not found" errors
-
-First check your file permissions.
-Your website and all contents must generally be world-readable.
-
-Ensure that mod-rewite is installed and working, and that your `.htaccess` file
-is being used. To verify the latter, create a file `test.out` containing the
-word "test" in the top directory of Friendica, make it world readable and point
-your web browser to
-
-	http://yoursitenamehere.com/test.out
-
-This file should be blocked. You should get a permission denied message.
-
-If you see the word "test" your Apache configuration is not allowing your
-`.htaccess` file to be used (there are rules in this file to block access to any
-file with .out at the end, as these are typically used for system logs).
-
-Make certain the `.htaccess` file exists and is readable by everybody, then look
-for the existence of "AllowOverride None" in the Apache server configuration for your site.
-This will need to be changed to "AllowOverride All".
-
-If you do not see the word "test", your `.htaccess` is working, but it is likely
-that mod-rewrite is not installed in your web server or is not working.
-
-On most Linux flavors:
-
-	% a2enmod rewrite
-	% /etc/init.d/apache2 restart
-
-Consult your hosting provider, experts on your particular Linux distribution or
-(if Windows) the provider of your Apache server software if you need to change
-either of these and can not figure out how. There is a lot of help available on
-the web. Search "mod-rewrite" along with the name of your operating system
-distribution or Apache package (if using Windows).
-
-### Unable to write the file config/local.config.php due to permissions issues
-
-Create an empty `config/local.config.php`file with that name and give it
-world-write permission.
-
-On Linux:
-
-	% touch config/local.config.php
-	% chmod 664 config/local.config.php
-
-Retry the installation. As soon as the database has been created,
-
-******* this is important *********
-
-	% chmod 644 config/local.config.php
-
-### Suhosin issues
-
-Some configurations with "suhosin" security are configured without an ability to
-run external processes. Friendica requires this ability. Following are some notes
-provided by one of our members.
-
-> On my server I use the php protection system Suhosin [http://www.hardened-php.net/suhosin/].
-> One of the things it does is to block certain functions like proc_open, as
-> configured in `/etc/php5/conf.d/suhosin.ini`:
-> 
->     suhosin.executor.func.blacklist = proc_open, ...
->
-> For those sites like Friendica that really need these functions they can be
-> enabled, e.g. in `/etc/apache2/sites-available/friendica`:
->
-> 	<Directory /var/www/friendica/>
-> 	  php_admin_value suhosin.executor.func.blacklist none
-> 	  php_admin_value suhosin.executor.eval.blacklist none
-> 	</Directory>
-> 
-> This enables every function for Friendica if accessed via browser, but not for
-> the cronjob that is called via php command line. I attempted to enable it for
-> cron by using something like:
-> 
-> 	*/10 * * * * cd /var/www/friendica/friendica/ && sudo -u www-data /usr/bin/php \
->       -d suhosin.executor.func.blacklist=none \
->       -d suhosin.executor.eval.blacklist=none -f bin/worker.php
-> 
-> This worked well for simple test cases, but the friendica-cron still failed
-> with a fatal error:
-> 
-> 	suhosin[22962]: ALERT - function within blacklist called: proc_open()
->     (attacker 'REMOTE_ADDR not set', file '/var/www/friendica/friendica/boot.php',
->     line 1341)
-> 
-> After a while I noticed, that `bin/worker.php` calls further PHP script via `proc_open`.
-> These scripts themselves also use `proc_open` and fail, because they are NOT
-> called with `-d suhosin.executor.func.blacklist=none`.
-> 
->  So the simple solution is to put the correct parameters into `config/local.config.php`:
-> 
-> 	'config' => [
-> 		//Location of PHP command line processor
-> 		'php_path' => '/usr/bin/php -d suhosin.executor.func.blacklist=none \
->               -d suhosin.executor.eval.blacklist=none',
-> 	],
-> 
-> This is obvious as soon as you notice that the friendica-cron uses `proc_open`
-> to execute PHP scripts that also use `proc_open`, but it took me quite some time to find that out.
-> I hope this saves some time for other people using suhosin with function blacklists.
-
-### Unable to create all mysql tables on MySQL 5.7.17 or newer
-
-If the setup fails to create all the database tables and/or manual creation from
-the command line fails, with this error:
-
-	ERROR 1067 (42000) at line XX: Invalid default value for 'created'
-
-You need to adjust your my.cnf and add the following setting under the [mysqld]
-section:
-
-	sql_mode = '';
-
-After that, restart mysql and try again.

README.md

@@ -13,6 +13,7 @@ With Friendica, you can also fully interact with anyone on Twitter, post on Face
 
 Join today and [get your Friendica profile!](https://dir.friendica.social/servers 'Join Friendica today!')
 
+Have a look at the [installation documentation](doc/Install.md) for further information about installing and using Friendica.
 
 ### Friendica Screenshots
 

doc/Install.md

@@ -1,28 +1,34 @@
-Friendica Installation
+# Friendica Installation
-===============
+
 
 We've tried very hard to ensure that Friendica will run on commodity hosting platforms - such as those used to host Wordpress blogs and Drupal websites.
 We offer a manual and an automatic installation.
 But be aware that Friendica is more than a simple web application.
+
 It is a complex communications system which more closely resembles an email server than a web server.
 For reliability and performance, messages are delivered in the background and are queued for later delivery when sites are down.
 This kind of functionality requires a bit more of the host system than the typical blog.
+
 Not every PHP/MySQL hosting provider will be able to support Friendica.
 Many will.
-But **please** review the requirements and confirm these with your hosting provider prior to installation.
 
-Also if you encounter installation issues, please let us know via the [helper](http://forum.friendi.ca/profile/helpers) or the [developer](https://forum.friendi.ca/profile/developers) forum or [file an issue](https://github.com/friendica/friendica/issues).
+But **please** review the [requirements](#1_2_1) and confirm these with your hosting provider prior to installation.
+
+## Support
+If you encounter installation issues, please let us know via the [helper](http://forum.friendi.ca/profile/helpers) or the [developer](https://forum.friendi.ca/profile/developers) forum or [file an issue](https://github.com/friendica/friendica/issues).
+
 Please be as clear as you can about your operating environment and provide as much detail as possible about any error messages you may see, so that we can prevent it from happening in the future.
 Due to the large variety of operating systems and PHP platforms in existence we may have only limited ability to debug your PHP installation or acquire any missing modules - but we will do our best to solve any general code issues.
+
 If you do not have a Friendica account yet, you can register a temporary one at [tryfriendica.de](https://tryfriendica.de) and join the forums mentioned above from there.
 The account will expire after 7 days, but you can ask the server admin to keep your account longer, should the problem not be resolved after that.
 
-Before you begin: Choose a domain name or subdomain name for your server.
+## Prerequisites
-Put some thought into this.
-While changing it after installation is supported, things still might break.
 
-Requirements
+* Choose a domain name or subdomain name for your server. Put some thought into this. While changing it after installation is supported, things still might break.
----
+* Setup HTTPS on your domain. 
+
+### Requirements
 
 * Apache with mod-rewrite enabled and "Options All" so you can use a local .htaccess file
 * PHP 7+ (PHP 7.1+ is recommended for performance and official support)
@@ -30,18 +36,20 @@ Requirements
   * Curl, GD, PDO, MySQLi, hash, xml, zip and OpenSSL extensions
   * The POSIX module of PHP needs to be activated (e.g. [RHEL, CentOS](http://www.bigsoft.co.uk/blog/index.php/2014/12/08/posix-php-commands-not-working-under-centos-7) have disabled it)
   * some form of email server or email gateway such that PHP mail() works
-* Mysql 5.6+ or an equivalent alternative for MySQL (MariaDB, Percona Server etc.)
+* MySQL 5.6+ or an equivalent alternative for MySQL (MariaDB, Percona Server etc.)
-* the ability to schedule jobs with cron (Linux/Mac) or Scheduled Tasks (Windows) (Note: other options are presented in Section 7 of this document.)
+* ability to schedule jobs with cron (Linux/Mac) or Scheduled Tasks (Windows)
-* Installation into a top-level domain or sub-domain (without a directory/path component in the URL) is preferred. Directory paths will not be as convenient to use and have not been thoroughly tested.
+* installation into a top-level domain or sub-domain (without a directory/path component in the URL) is RECOMMENDED. Directory paths will not be as convenient to use and have not been thoroughly tested. This is REQUIRED if you wish to communicate with the Diaspora network.
-* If your hosting provider doesn't allow Unix shell access, you might have trouble getting everything to work.
 
-Optional
+**If your hosting provider doesn't allow Unix shell access, you might have trouble getting everything to work.**
----
+
+For alternative server configurations (such as Nginx server and MariaDB database engine), refer to the [Friendica wiki](https://github.com/friendica/friendica/wiki).
+
+### Optional 
 
 * PHP ImageMagick extension (php-imagick) for animated GIF support.
+* [Composer](https://getcomposer.org/) for a git install
 
-Installation procedure
+## Installation procedure
----
 
 ### Alternative Installation Methods
 
@@ -49,20 +57,27 @@ This guide will walk you through the manual installation process of Friendica.
 If this is nothing for you, you might be interested in
 
 * the [Friendica Docker image](https://github.com/friendica/docker) or
-* how [install Friendica with YunoHost](https://github.com/YunoHost-Apps/friendica_ynh).
+* how to [install Friendica with YunoHost](https://github.com/YunoHost-Apps/friendica_ynh).
 
 ### Get Friendica
 
 Unpack the Friendica files into the root of your web server document area.
-If you are able to do so, we recommend using git to clone the source repository rather than to use a packaged tar or zip file.
+
+If you copy the directory tree to your webserver, make sure that you also copy 
+`.htaccess-dist` - as "dot" files are often hidden and aren't normally copied.
+
+**OR**
+
+Clone the [friendica/friendica GitHub repository](https://github.com/friendica/friendica) and import dependencies.
 This makes the software much easier to update.
+
 The Linux commands to clone the repository into a directory "mywebsite" would be
 
     git clone https://github.com/friendica/friendica.git -b master mywebsite
     cd mywebsite
     bin/composer.phar install --no-dev
 
-Make sure the folder *view/smarty3* exists and is writable by the webserver user, in this case `www-data`
+Make sure the folder *view/smarty3* exists and is writable by the webserver user, in this case *www-data*
 
     mkdir view/smarty3
     chown www-data:www-data view/smarty3
@@ -76,8 +91,6 @@ Clone the addon repository (separately):
 
     git clone https://github.com/friendica/friendica-addons.git -b master addon
 
-If you copy the directory tree to your webserver, make sure that you also copy .htaccess - as "dot" files are often hidden and aren't normally copied.
-
 If you want to use the development version of Friendica you can switch to the develop branch in the repository by running
 
     git checkout develop
@@ -85,7 +98,8 @@ If you want to use the development version of Friendica you can switch to the de
     cd addon
     git checkout develop
 
-please be aware that the develop branch may break your Friendica node at any time.
+**Be aware that the develop branch is unstable and may break your Friendica node at any time.**
+You should have a recent backup before updating.
 If you encounter a bug, please let us know.
 
 ### Create a database
@@ -94,15 +108,9 @@ Create an empty database and note the access details (hostname, username, passwo
 
 Friendica needs the permission to create and delete fields and tables in its own database.
 
-With newer releases of MySQL (5.7.17 or newer), you might need to set the sql_mode to '' (blank).
+Please check the [troubleshooting](#1_6) section if running on MySQ 5.7.17 or newer.
-Use this setting when the installer is unable to create all the needed tables due to a timestamp format problem.
-In this case find the [mysqld] section in your my.cnf file and add the line :
 
-    sql_mode = ''
+### Option A: Run the installer
-
-Restart mysql and you should be fine.
-
-### Option A: Run the manual installer
 
 Point your web browser to the new site and follow the instructions.
 Please note any error messages and correct these before continuing.
@@ -111,9 +119,9 @@ If you need to specify a port for the connection to the database, you can do so
 
 *If* the manual installation fails for any reason, check the following:
 
-* Does "config/local.config.php" exist? If not, edit config/local-sample.config.php and change the system settings.
+* Does `config/local.config.php` exist? If not, edit `config/local-sample.config.php` and change the system settings.
 * Rename to `config/local.config.php`.
-* Is the database is populated? If not, import the contents of `database.sql` with phpmyadmin or the mysql command line.
+* Is the database populated? If not, import the contents of `database.sql` with phpmyadmin or the mysql command line.
 
 At this point visit your website again, and register your personal account.
 Registration errors should all be recoverable automatically.
@@ -206,18 +214,18 @@ Navigate to the main Friendica directory and execute the following command:
 
 ### Prepare .htaccess file
 
-Copy .htaccess-dist to .htaccess (be careful under Windows) to have working mod-rewrite again. If you have installed Friendica into a sub directory, like /friendica/ set this path in RewriteBase accordingly.
+Copy `.htaccess-dist` to `.htaccess` (be careful under Windows) to have working mod-rewrite again. If you have installed Friendica into a sub directory, like */friendica/* set this path in `RewriteBase` accordingly.
 
 Example:
 
     cp .htacces-dist .htaccess
 
-*Note*: Do **not** rename the .htaccess-dist file as it is tracked by GIT and renaming will cause a dirty working directory.
+*Note*: Do **not** rename the `.htaccess-dist` file as it is tracked by GIT and renaming will cause a dirty working directory.
 
 ### Verify the "host-meta" page is working
 
-Friendica should respond automatically to important addresses under the /.well-known/ rewrite path.
+Friendica should respond automatically to important addresses under the */.well-known/* rewrite path.
-One critical URL would look like, for example, https://example.com/.well-known/host-meta
+One critical URL would look like, for example: https://example.com/.well-known/host-meta   
 It must be visible to the public and must respond with an XML file that is automatically customized to your site.
 
 If that URL is not working, it is possible that some other software is using the /.well-known/ path.
@@ -225,13 +233,23 @@ Other symptoms may include an error message in the Admin settings that says "hos
 This is a severe configuration issue that prevents server to server communication."
 Another common error related to host-meta is the "Invalid profile URL."
 
-Check for a .well-known directory that did not come with Friendica.
+Check for a `.well-known` directory that did not come with Friendica.
 The preferred configuration is to remove the directory, however this is not always possible.
 If there is any /.well-known/.htaccess file, it could interfere with this Friendica core requirement.
 You should remove any RewriteRules from that file, or remove that whole file if appropriate.
 It may be necessary to chmod the /.well-known/.htaccess file if you were not given write permissions by default.
 
-### Set up the worker
+## Register the admin account
+
+At this point visit your website again, and register your personal account with the same email as in the `config.admin_email` config value.
+Registration errors should all be recoverable automatically.
+
+If you get any *critical* failure at this point, it generally indicates the database was not installed correctly. 
+You might wish to delete/rename `config/local.config.php` to another name and drop all the database tables so that you can start fresh.
+
+## Post Install Configuration
+
+### (REQUIRED) Background tasks
 
 Set up a cron job or scheduled task to run the worker once every 5-10 minutes in order to perform background processing.
 Example:
@@ -240,6 +258,8 @@ Example:
 
 Change "/base/directory", and "/path/to/php" as appropriate for your situation.
 
+#### cron job for worker
+
 If you are using a Linux server, run "crontab -e" and add a line like the
 one shown, substituting for your unique paths and settings:
 
@@ -253,10 +273,24 @@ If it is not possible to set up a cron job then please activate the "frontend wo
 
 Once you have installed Friendica and created an admin account as part of the process, you can access the admin panel of your installation and do most of the server wide configuration from there.
 
+#### worker alternative: daemon
+Otherwise, you’ll need to use the command line on your remote server and start the Friendica daemon (background task) using the following command:
+
+    cd /path/to/friendica; php bin/daemon.php start
+
+Once started, you can check the daemon status using the following command:
+
+    cd /path/to/friendica; php bin/daemon.php status
+
+After a server restart or any other failure, the daemon needs to be restarted. 
+This could be achieved by a cronjob.
+
+### (RECOMMENDED) Logging & Log Rotation
+
 At this point it is recommended that you set up logging and logrotation.
 To do so please visit [Settings](help/Settings) and search the 'Logs' section for more information.
 
-### Set up a backup plan
+### (RECOMMENDED) Set up a backup plan
 
 Bad things will happen.
 Let there be a hardware failure, a corrupted database or whatever you can think of.
@@ -264,3 +298,155 @@ So once the installation of your Friendica node is done, you should make yoursel
 
 The most important file is the `config/local.config.php` file.
 As it stores all your data, you should also have a recent dump of your Friendica database at hand, should you have to recover your node.
+
+### (OPTIONAL) Reverse-proxying and HTTPS
+
+Friendica looks for some well-known HTTP headers indicating a reverse-proxy
+terminating an HTTPS connection.
+While the standard from RFC 7239 specifies the use of the `Forwarded` header.
+
+    Forwarded: for=192.0.2.1; proto=https; by=192.0.2.2
+
+Friendica also supports a number on non-standard headers in common use.
+
+    X-Forwarded-Proto: https
+
+    Front-End-Https: on
+
+    X-Forwarded-Ssl: on
+
+It is however preferable to use the standard approach if configuring a new server.
+
+## Troubleshooting
+
+### "System is currently unavailable. Please try again later"
+
+Check your database settings.
+It usually means your database could not be opened or accessed.
+If the database resides on the same machine, check that the database server name is "localhost".
+
+### 500 Internal Error
+
+This could be the result of one of our Apache directives not being supported by your version of Apache. Examine your apache server logs.
+You might remove the line "Options -Indexes" from the .htaccess file if you are using a Windows server as this has been known to cause problems.
+Also check your file permissions. Your website and all contents must generally be world-readable.
+
+It is likely that your web server reported the source of the problem in its error log files.
+Please review these system error logs to determine what caused the problem.
+Often this will need to be resolved with your hosting provider or (if self-hosted) your web server configuration.
+
+### 400 and 4xx "File not found" errors
+
+First check your file permissions.
+Your website and all contents must generally be world-readable.
+
+Ensure that mod-rewite is installed and working, and that your `.htaccess` file
+is being used. To verify the latter, create a file `test.out` containing the
+word "test" in the top directory of Friendica, make it world readable and point
+your web browser to
+
+	http://yoursitenamehere.com/test.out
+
+This file should be blocked. You should get a permission denied message.
+
+If you see the word "test" your Apache configuration is not allowing your
+`.htaccess` file to be used (there are rules in this file to block access to any
+file with .out at the end, as these are typically used for system logs).
+
+Make certain the `.htaccess` file exists and is readable by everybody, then look
+for the existence of "AllowOverride None" in the Apache server configuration for your site.
+This will need to be changed to "AllowOverride All".
+
+If you do not see the word "test", your `.htaccess` is working, but it is likely
+that mod-rewrite is not installed in your web server or is not working.
+
+On most Linux flavors:
+
+	% a2enmod rewrite
+	% /etc/init.d/apache2 restart
+
+Consult your hosting provider, experts on your particular Linux distribution or
+(if Windows) the provider of your Apache server software if you need to change
+either of these and can not figure out how. There is a lot of help available on
+the web. Search "mod-rewrite" along with the name of your operating system
+distribution or Apache package (if using Windows).
+
+### Unable to write the file config/local.config.php due to permissions issues
+
+Create an empty `config/local.config.php`file and apply world-write permission.
+
+On Linux:
+
+	% touch config/local.config.php
+	% chmod 664 config/local.config.php
+
+Retry the installation. As soon as the database has been created,
+
+******* this is important *********
+
+	% chmod 644 config/local.config.php
+
+### Suhosin issues
+
+Some configurations with "suhosin" security are configured without an ability to
+run external processes. Friendica requires this ability. Following are some notes
+provided by one of our members.
+
+> On my server I use the php protection system Suhosin [http://www.hardened-php.net/suhosin/].
+> One of the things it does is to block certain functions like proc_open, as
+> configured in `/etc/php5/conf.d/suhosin.ini`:
+> 
+>     suhosin.executor.func.blacklist = proc_open, ...
+>
+> For those sites like Friendica that really need these functions they can be
+> enabled, e.g. in `/etc/apache2/sites-available/friendica`:
+>
+> 	<Directory /var/www/friendica/>
+> 	  php_admin_value suhosin.executor.func.blacklist none
+> 	  php_admin_value suhosin.executor.eval.blacklist none
+> 	</Directory>
+> 
+> This enables every function for Friendica if accessed via browser, but not for
+> the cronjob that is called via php command line. I attempted to enable it for
+> cron by using something like:
+> 
+> 	*/10 * * * * cd /var/www/friendica/friendica/ && sudo -u www-data /usr/bin/php \
+>       -d suhosin.executor.func.blacklist=none \
+>       -d suhosin.executor.eval.blacklist=none -f bin/worker.php
+> 
+> This worked well for simple test cases, but the friendica-cron still failed
+> with a fatal error:
+> 
+> 	suhosin[22962]: ALERT - function within blacklist called: proc_open()
+>     (attacker 'REMOTE_ADDR not set', file '/var/www/friendica/friendica/boot.php',
+>     line 1341)
+> 
+> After a while I noticed, that `bin/worker.php` calls further PHP script via `proc_open`.
+> These scripts themselves also use `proc_open` and fail, because they are NOT
+> called with `-d suhosin.executor.func.blacklist=none`.
+> 
+>  So the simple solution is to put the correct parameters into `config/local.config.php`:
+> 
+> 	'config' => [
+> 		//Location of PHP command line processor
+> 		'php_path' => '/usr/bin/php -d suhosin.executor.func.blacklist=none \
+>               -d suhosin.executor.eval.blacklist=none',
+> 	],
+> 
+> This is obvious as soon as you notice that the friendica-cron uses `proc_open`
+> to execute PHP scripts that also use `proc_open`, but it took me quite some time to find that out.
+> I hope this saves some time for other people using suhosin with function blacklists.
+
+### Unable to create all mysql tables on MySQL 5.7.17 or newer
+
+If the setup fails to create all the database tables and/or manual creation from
+the command line fails, with this error:
+
+	ERROR 1067 (42000) at line XX: Invalid default value for 'created'
+
+You need to adjust your my.cnf and add the following setting under the [mysqld]
+section:
+
+	sql_mode = '';
+
+After that, restart mysql and try again.

doc/Update.md

@@ -6,6 +6,7 @@ Updating Friendica
 ## Using a Friendica archive
 
 If you installed Friendica in the ``path/to/friendica`` folder:
+
 1. Unpack the new Friendica archive in ``path/to/friendica_new``.
 2. Copy ``config/local.config.php``, ``photo/`` and ``proxy/`` from ``path/to/friendica`` to ``path/to/friendica_new``.
 3. Rename the ``path/to/friendica`` folder to ``path/to/friendica_old``.