Fix: 'Upload button tooltip doesn't disappear'

Added .ocdata file to check for data folder validity

Fix 'Undefined variable: message' in OCP\Util::logException

Close session faster 

Remove cursor:pointer CSS from li element

Fixes issue #7461. Tipsy tooltip must be hidden when the upload starts. Otherwise it covers the progress bar and stays in DOM.

Add mimetype for MKV videos

This will make oC create previews for MKVs.

Test file: http://www.auby.no/files/video_tests/h264_720p_hp_5.1_3mbps_vorbis_styled_and_unstyled_subs_suzumiya.mkv

To test this just apply this change and upload the test file, if an preview is generated this change is most likely working as expecting.

Do not allow setting an expiration date in the past

Improve sorting performance of large lists of files

Conflicts:
	apps/files/ajax/upgrade.php

updating 3rdparty submodule

drop file cache migration OC5 -> OC6

Fix validation of allowed personal backend

Set overflow-y to auto

Fix smb4php to work with home shares

- test config was written correctly (global and local)
- test that personal mount points can be added for allowed backends
- test that personal mount points cannot be added for disallowed backends
- added $skipTest flag to make it possible add mount points without
  doing an actual check/connection (note: this is necessary because the
  static class OC_Mount_Config cannot be mocked)

Display admin option for public upload with encryption enabled

Now that public upload works with encryption, the admin option to toggle
it must be made visible.

introduce reopen() method to be used for unit test execution only - right after a unit test has been executed the session will be reopened

Move routing classes to an interface and expose it in the public api

Stat'ing a share with url_stat now checks if the user can run 'ls' in that share rather than checking if the share is listed by the server. This means that OwnCloud can now mount user home shares, which are never listed by the server.

use a non-recursive chmod on the datadir

Correctly round bytes when converted from human readable format

clarify the use-case of the encryption app.