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.

Fix grammar for allowdebug description

Add a full stop between sentences for the allowdebug description.

Fix grammar for the hidepages description

Fix CodeSniffer violations for PHP files

Fix violations for Generic.PHP.LowerCaseConstant.Found

Fix CodeSniffer violations

Change indentation to ensure code confirms to CodeSniffer rules.

Revert "add html5 attributes to email fields of the config manager"

This reverts commit 0d21c87f31bb8931973f720c04346bf5f8612470.

de/de-informal/en: Removed redundant suffixes in TOC of configuration
manager / Synchronize terms in de and de-informal

de/de-informal updates: Replace "Nutzer" with more common word "Benutzer"
/ fix several typos / Fixes FS#2821

Brazilian Portuguese language update

de/de-informal: localization updates (delete user function)