Throw storage not available on guzzle error

Handle returned null value in app level code

Throw StorageNotAvailable if propfind on root failed

allow remote shares for users with email as usernames

If the remote server is in maintenance mode, we must throw storage not
available exception instead of not found which might auto-remove the
share.

If PROPFIND fails with 404 or 405 on the remote share root, it means the
storage is not available. Throw StorageNotAvailable is such case.

Fix OC.joinPaths with empty arguments

Strip public webdav info about sharing and mount points

Add helper functions for host, port and webroot

* getApplication on OCSClient can also return null
  this is now handled properly
* fixes #17587

These should be used in the future instead of location.*.
It will make it possible to stub these methods for writing unit tests
and simulating different URL schemes.

Remove information about whether a file is an incoming share or mount
point when requested over public webdav.

When empty arguments are given, the leading or trailing slash was not
detected properly.

Move mimetypes.list.php to config/mimetypemapping.dist.json

Add OC.joinPaths for convenient path joining

Update JS unit test libs

Move mimetypealiases.json to mimetypealiases.dist.json

Update sinon to 1.15.4.
Update karma-jasmine to 0.3.0
Update jasmine to 2.3.4

This brings a bunch of new useful functions for unit testing.

Move away from OCA.files.getMimeIcon and use OC.MimeType.getIconUrl

Fix the config.php owner check for console.php

Fixed "Remote IP:" syntax on failed logins

The config directory must be taken from OC::$configDir

Minor fix

 - Remove uneeded slash in the configdir path.

Add theme support to mimetypeIcon through imagePath integration

more secure way to update the database

[command] single user mode - use config object & add tests

Add getUserFolder to IRootFolder

Since we both use dir and httpd/unix-directory in OC they should map to
the same icon.

Fixes #17527