Remove config/addon-sample.config.php file in favor of per-addon configuration files

- Update documentation and .gitignore

.gitignore

@@ -10,10 +10,9 @@ home.html
 robots.txt
 
 #ignore local config
-/config/local.config.php
-/config/addon.config.php
-/config/local.ini.php
-/config/addon.ini.php
+!/config/local-sample.config.php
+/config/*.config.php
+/config/*.ini.php
 
 #ignore documentation, it should be newly built
 /doc/api

config/addon-sample.config.php

@@ -1,12 +0,0 @@
-<?php
-
-// Addon configuration
-
-// Copy this configuration file to addon.config.php and edit it if you want to configure addons, see below example for the twitter addon
-
-return [
-	'twitter' => [
-		'consumerkey' => '1234567890',
-		'consumersecret' => 'ABCDEFGHIJKLMONPQRSTUVWXYZ',
-	],
-];

doc/Config.md

@@ -37,8 +37,8 @@ The `config` directory holds key configuration files and can have different conf
 All of them have to end with `.config.php` and must not include `-sample` in their name.
 
 Some examples of common known configuration files:
-- `local.config.php` holds the current node custom configuration.
-- `addon.config.php` is optional and holds the custom configuration for specific addons.
+- `local.config.php` holds the base node custom configuration.
+- Any other file in this folder is meant for addon configuration.
 
 Addons can define their own default configuration values in `addon/[addon]/config/[addon].config.php` which is loaded when the addon is activated.
 
@@ -59,7 +59,7 @@ Currently, the following configurations are included:
 The legacy `.htconfig.php` configuration file is still supported, but is deprecated and will be removed in a subsequent Friendica release.
 
 The migration is pretty straightforward:
-If you had any addon-specific configuration in your `.htconfig.php`, just copy `config/addon-sample.config.php` to `config/addon.config.php` and move your configuration values.
+If you had any addon-specific configuration in your `.htconfig.php`, copy `config/local-sample.config.php` to `config/addon.config.php` and move your configuration values.
 Afterwards, copy `config/local-sample.config.php` to `config/local.config.php`, move the remaining configuration values to it according to the following conversion chart, then rename your `.htconfig.php` to check your node is working as expected before deleting it.
 
 <style>
@@ -206,7 +206,7 @@ $lang = "value";
 The legacy `config/local.ini.php` configuration file is still supported, but is deprecated and will be removed in a subsequent Friendica release.
 
 The migration is pretty straightforward:
-If you had any addon-specific configuration in your `config/addon.ini.php`, just copy `config/addon-sample.config.php` to `config/addon.config.php` and move your configuration values.
+If you had any addon-specific configuration in your `config/addon.ini.php`, copy `config/local-sample.config.php` to `config/addon.config.php` and move your configuration values.
 Afterwards, copy `config/local-sample.config.php` to `config/local.config.php`, move the remaining configuration values to it according to the following conversion chart, then rename your `config/local.ini.php` file to check your node is working as expected before deleting it.
 
 <table class="config">
@@ -278,16 +278,16 @@ key[] = value3
 
 ### Database Settings
 
-The configuration variables database.hostname, database.username, database.password, database.database and database.charset are holding your credentials for the database connection.
-If you need to specify a port to access the database, you can do so by appending ":portnumber" to the database.hostname variable.
+The configuration variables `database.hostname` (or `database.socket`), `database.username`, `database.password`, `database.database` and optionally `database.charset` are holding your credentials for the database connection.
+If you need to specify a port to access the database, you can do so by appending ":portnumber" to the `database.hostname` variable.
 
     'database' => [
         'hostname' => 'your.mysqlhost.com:123456',
     ]
 
-If all of the following environment variables are set, Friendica will use them instead of the previously configured variables for the db:
+If all the following environment variables are set, Friendica will use them instead of the previously configured variables for the db:
 
-    MYSQL_HOST
+    MYSQL_HOST or MYSQL_SOCKET
     MYSQL_PORT
     MYSQL_USERNAME
     MYSQL_PASSWORD
@@ -316,7 +316,7 @@ Enabling the admin panel for an account, and thus making the account holder admi
     
 
 Where you have to match the email address used for the account with the one you enter to the `config/local.config.php` file.
-If more then one account should be able to access the admin panel, separate the email addresses with a comma.
+If more than one account should be able to access the admin panel, separate the email addresses with a comma.
 
     'config' => [
         'admin_email' => 'someone@example.com,someoneelse@example.com',