Merge "Add Special:Mute as a shortcut for muting notifications"

diff --cc RELEASE-NOTES-1.34
Simple merge

diff --cc autoload.php
Simple merge

diff --cc includes/DefaultSettings.php
Simple merge

diff --cc includes/specialpage/SpecialPageFactory.php
Simple merge

diff --cc includes/specials/SpecialEmailUser.php
Simple merge

diff --cc languages/i18n/en.json
Simple merge

diff --cc languages/i18n/qqq.json
Simple merge