owncloud/core — pull request #7288 by blizzz (2014-02-19 14:48:39+00:00)
Title: Group Database backend must not gather user details itself but ask user ...

...backendS

Otherwise users are returned only from the internal db backend, but users from other backends can be added to local groups. It is a regression compared to OC 5.

Also needed for #7151

Please review @icewind1991 @bartv2 @schiesbn