Clean up known remaining colour output issues (#1613)

* Print newline on error message

* Output last three lines of error if update fails

* Consistent error messages & housekeeping

* Add shellcheck directive to ignore COL_TABLE
* Quoted and braced variables for codebase consistency
* Escaped newlines correctly
* Made error messages consistent (indenting and wording)
* Removed consecutive echos

* Conditional formatting consistency

* Braced, quoted and used [[ on conditionals

* Fix specific ShellCheck issues

* Fixed issues that could be safely changed without extensive testing

* Update SELinux whiptail behaviour & more

* Colourised some strings
* Fixed multiple line string indenting
* Made output consistent with existing codebase
* Removed sequential echos
* Make SELinux whiptail use "--defaultno", and change text wording

* Add help text for hostrecord, and colourise output

* this should fix the tests...

Signed-off-by: Adam Warner <adamw@rner.email>

* revert changes to `update_package_cache()` to prove tests

Signed-off-by: Adam Warner <adamw@rner.email>

advanced/Scripts/webpage.sh

@@ -29,6 +29,7 @@ Options:
   -c, celsius         Set Celsius as preferred temperature unit
   -f, fahrenheit      Set Fahrenheit as preferred temperature unit
   -k, kelvin          Set Kelvin as preferred temperature unit
+  -r, hostrecord      Add a name to the DNS associated to an IPv4/IPv6 address
   -h, --help          Show this help dialog
   -i, interface       Specify dnsmasq's interface listening behavior
                         Add '-h' for more info on interface usage"
@@ -392,12 +393,23 @@ RemoveDHCPStaticAddress() {
 }
 
 SetHostRecord() {
-	if [ -n "${args[3]}" ]; then
+  if [[ "${1}" == "-h" ]] || [[ "${1}" == "--help" ]]; then
+    echo "Usage: pihole -a hostrecord <domain> [IPv4-address],[IPv6-address]
+Example: 'pihole -a hostrecord home.domain.com 192.168.1.1,2001:db8:a0b:12f0::1'
+Add a name to the DNS associated to an IPv4/IPv6 address
+
+Options:
+  \"\"                  Empty: Remove host record
+  -h, --help          Show this help dialog"
+    exit 0
+  fi
+
+	if [[ -n "${args[3]}" ]]; then
 		change_setting "HOSTRECORD" "${args[2]},${args[3]}"
-		echo "Setting host record for ${args[2]} -> ${args[3]}"
+		echo -e "  ${TICK} Setting host record for ${args[2]} to ${args[3]}"
 	else
 		change_setting "HOSTRECORD" ""
-		echo "Removing host record"
+		echo -e "  ${TICK} Removing host record"
 	fi
 
 	ProcessDNSSettings
@@ -474,7 +486,7 @@ main() {
 		"resolve"           ) ResolutionSettings;;
 		"addstaticdhcp"     ) AddDHCPStaticAddress;;
 		"removestaticdhcp"  ) RemoveDHCPStaticAddress;;
-		"hostrecord"        ) SetHostRecord;;
+		"-r" | "hostrecord" ) SetHostRecord "$3";;
 		"-i" | "interface"  ) SetListeningMode "$@";;
 		"-t" | "teleporter" ) Teleporter;;
 		"adlist"            ) CustomizeAdLists;;