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

adjusted authad language files for config option change

LDAP: do not bind anonymously if superuser is set FS#2607

Brazilian Portuguese language update

Finnish language update

German language update

Dutch language update

Brazilian Portuguese language update

Latvian language update

Chinese language update

Korean language update

de/de-informal: config plugin - Clean up the TOC in the configuration page / No need to add "Konfiguration" or "Plugin" to every element if the heading tells you that.

de/de-informal: language updates for the core, authldap, authmysql, authpgsql

Update settings.php

Update metadata.php

Without this unable to access AD info. Also allows SSO.