add comment to Unified Diff Formatter making it clear the output is unsafe for use in HTML as is
FS#2738, fix double encoding of html entities in RSS feeds (updates feed.php for changes to Diff class introduced in PR#179)
FS#2748, fix double encoding of html entities in subscription email diffs (updates subscription.php for changes to Diff class introduced in PR#179)
Revert "German language update"

This reverts commit ba09710ad34bb383ae3526e84490a3d545f78866.

Conflicts:
	lib/plugins/authad/lang/de/settings.php
Rename ad_username to admin_username
canDo getUsers to false when unavailable
de/de-informal: Re-apply the updates of ba09710ad34bb383ae3526e84490a3d545f78866
de/de-informal: Re-add TOC suffixes (Will be removed after the release
again)
de/de-informal: Change "Vorlage" to "Template"
Merge pull request #214 from splitbrain/authadfixes

Rename ad_usernamepassword to admin_username/password
Merge pull request #213 from lupo49/master

de/de-informal language updates for several components.
Merge pull request #211 from splitbrain/nonwikidiffs

Fix double encoding of html diff output in syndicated feeds and subscrition emails
fix ids in de lang of authAD
Korean language update
Japanese language update
fix expiry check for adLDAP version FS#2759
Merge pull request #215 from splitbrain/authadlangde

fix ids in de lang of authAD
authad: don't request empty fields
authad: added compatibility for old option names

adLDAP renamed the ad_username and ad_password to admin_username
admin_password recently. this makes our backend recognize the old
settings
authad: capabilities depend on userdomain specific config
removed debug statement

thanks @Klap-in