fixed search'and'replace fuckup in config plugin

Remove error supression for file_exists()

In an older version of PHP a file_exists() call would issue a warning
when the file did not exist. This was fixed in later PHP releases. Since
we require PH

Remove error supression for file_exists()

In an older version of PHP a file_exists() call would issue a warning
when the file did not exist. This was fixed in later PHP releases. Since
we require PHP 5.3 now, there's no need to supress any error here
anymore. This might even give a minor performance boost.

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PHPDocs and some improvements

more PHPDocs, unused var, small bit code reformatting

more scrutinizer issue improvements

updated dates in info.txt of various plugins and template

Bulgarian language update

Fixed spelling in lang.php

Changed "Erweitertet" to "Erweitert" since the word "Erweitertet" does not exist, see: http://www.duden.de/suchen/dudenonline?s=erweitertet

Also, see leo.org translatio

Fixed spelling in lang.php

Changed "Erweitertet" to "Erweitert" since the word "Erweitertet" does not exist, see: http://www.duden.de/suchen/dudenonline?s=erweitertet

Also, see leo.org translation for "advanced" to german: http://dict.leo.org/ende/index_de.html#/search=advanced&searchLoc=0&resultOrder=basic&multiwordShowSingle=on

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add visibility and PHPDocs to config plugin class

added config stuff for disabling RSS

Extend showuseras config with username_link

uses the user interwiki link as profile link

removed empty language files

our translation interface used to submit empty files for a while but no
longer does, so these can go

translation update

FS#2888 fix for templates

fix numeric expression read in plugin default conf FS#2888

fix mistranslated messages

Fix issues from teams:i18n:translation-check in localizations

comment improvements

fix signatures and old by references

fix php strict notices

Translation update in Korean

Fix CodeSniffer whitespace violoations

Removed extraneous whitespace to eliminate errors reported by the
Squiz.WhiteSpace.SuperfluousWhitespace sniff.

Translation update in Korean

Fix CodeSniffer violations for PHP files

Fix violations for Squiz.Commenting.DocCommentAlignment.SpaceBeforeTag

Conflicts:
inc/parser/xhtml.php

Fix grammar in proxy_except description

Remove trailing preposition.