Disable filesystem_check_changes by default

Remove Log info when no group filter is set, fixes #17921

update underscore to 1.8.3

Trigger "apprendered" event in users page

Add use of docker instance for MariaDB

fix uncaught exception on not permitted file types when setting avatar, fixes #17232

This will prevent detecting remote changes done in the data folder /
root storage by default. In the rare cases where the data folder is
shared with other apps/users outside ownCloud and change detection is
needed, the admin will have to set the option explicitly from now on.

Note that this doesn't affect external storages which have their own
setting in the mount options.

This will properly update the controls bar width and display the search
box initially.

Fix parsing of sharetime as string

Detect old NSS and OpenSSL versions

Double slash for SMB storage id for compatibility

set logger in constructor

This will detect old NSS and OpenSSL versions and show appropriate errors in the admin interface.

Fixes https://github.com/owncloud/core/issues/17901

Mimetypedetector

Remote shares should be uique

The log message is superfluous and too noisy. If an admin decides not to use groups, he does not need to be reminded about it on almost every request.

In some cases the ajax/share.php will return the share time as string.
If this is the case it would get parsed completely wrong and cause the
share dropdown to not work anymore. This change will properly cast the
string to an interger and also fallback if this is not possible.

Fix tooltip for modification time

get header size before we open the file to avoid locking exception

Only set is encrypted when encryption is enabled

In order to properly test the mimetype function:

* constructor takes path to configdir
* Added unit tests for mimetype (only if vfsStream is available)

* Copied unit tests from old functions