treat empty AD credentials as NULL values FS#2781

Korean language update

moved X-UA-Compatible from meta tag to be sent by http header instead

fixed references from old mysql authtype to new mysql plugin in mysql.conf example

fixed broken default config options (FS#2789)

Add check for token when resizing and caching external images

Revert "fixed space of list points beside a floating image"

This reverts commit 37764cbb34237da3c96bab21102e44ffe2715cd9.

fixed space of list points beside a floating image

updated dates in templates' and plugins' info.txt files

Japanese language update

Czech language update

fixed missing css placeholders for page container

Russian language update

Japanese language update

authad: capabilities depend on userdomain specific config

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: don't request empty fields

fix expiry check for adLDAP version FS#2759

Japanese language update

fix ids in de lang of authAD

de/de-informal: Change "Vorlage" to "Template"

de/de-informal: Re-add TOC suffixes (Will be removed after the release
again)

de/de-informal: Re-apply the updates of ba09710ad34bb383ae3526e84490a3d545f78866

Rename ad_username to admin_username
canDo getUsers to false when unavailable

Revert "German language update"

This reverts commit ba09710ad34bb383ae3526e84490a3d545f78866.

Conflicts:
lib/plugins/authad/lang/de/settings.php