Fix instances of preg_quote() without second parameter

Fix instances of preg_quote() without second parameter

This might work in specific cases, depending on the string we're
quoting, but is never correct. The instance in SpecialAllMessages.php
was resulting in incorrect behavior (and log spam, T103879).

Searched for this regex: preg_quote\((?:\([^)]+?\)|[^,()])+?\)

Change-Id: Icc88775970f4927ddf953e5ad7c5c19d59491573