use uid provided by setupfs hook to mount server2server shares

Prevent double slash in shareinfo request URL

certificate manager should always use a \OC\Files\View otherwise we will get problems for different primary storages

use uid provided by setupfs hook to mount server2server shares, otherwise mount will fail for public link shares

Remove duplicated definition of APIController

Add a method to set/unset multiple config values with one write

by default send mail for new server-to-server share

Don't check for `always_populate_raw_post_data` on HHVM

Do not retrieve shares through group if user has no group

HHVM seems to have problems with this at the moment (even setting those values in the php.ini of HHVM doesn't have helped much) and thus the unit test execution failed.

So it's better if we disable this check for now for HHVM.

Ignore favorites that are not available when creating the favorites list

Update SabreDAV to 1.8.12

This reduces the number of file writes we do for config.php and therefor
hopefully helps lowering the chances for empty config.php files

Also correctly return the exception for all cases when adding/removing favos

Add check for `HTTP_RAW_POST_DATA` setting for >= 5.6

Return false if the login is canceled in a hook

add config-option for an image's maximum filesize when generating previews

remove insane debug-log from OC_Image

Fix undefined offset 1 for wrong user mail address

* fixes Undefined offset: 1 at lib/private/mail.php#143

Get rid of log warning when using servercontainer