Print error if logged couldn't log it in index.php

In some rare env problem cases, the exception cannot be logged because
the logger couldn't be initialized properly. In such cases, we now
print the stack trace directly on the output.

Better comments in activity sidebar

FilesHome now also returns DAV properties

Remove strange consol logging hack

Fix links for files moved to .github folder.

The files home node must also return DAV properties like etag,
permissions, etc for the clients to work like they did with the old
endpoint.

This fix makes FilesHome extend the Sabre Directory class, this makes
the FilesPlugin and other plugins recognize it as a directory and will
retrieve the matching properties when applicable.

* Update phpunit dependency to 5.5

* getMock() -> createMock() or getMockBuilder()

* Fix integration tests - comment enable/disable app tests for now

* Update .htaccess

* Log the reason of occ controller failure

* Allow requests from SERVER_ADDR

In some cross-local-storage use cases, the Local storage is
instantiated with "/" as data directory. In such cases, calling
realpath() would cause PHP warnings when open_basedir is set.

This fix bypasses the realpath() call when dealing with a root storage.

Choose button remains disbaled for httpd/unix-directory

This is not correct. Hence in this patch we validate
if the mimetype is 'httpd/unix-directory'. If so we
don't disable it.

This patch addresses solution for issue: 26034

Signed-off-by: Sujith Haridasan <Sujith_Haridasan@mentor.com>

[9.2] Moving user ldap to it's own repo 

Prefilter inaccessible shares in DefaultShareProvider::getSharedWith()

Update CachedMountInfo for user home storage

Use true random string as uri for public calendars - as a result we c…

Fix trashbin deleteallhooks solution2 (with bulk hook)

The birthday calendar can only hold VEVENT

[9.2] Update some more libs

Use true random string as uri for public calendars - as a result we can no longer return the pre-publish-url

Pass web requests to occ controller if upgrade is needed

The DefaultShareProvider now does a DB-level check to find out whether
file_source is accessible at all (deleted file) or whether it's in the
trashbin of a home storage.

One small corner case where the home storage id is in md5 form cannot
be covered properly with this approach.

Allow increasing permissions for share owner

The CSRF check in the FilesPlugin is being done to early - fixed