The check for invalid paths is actually over-complicated and performed twice resulting in a performance penalty. Additionally, I decided to add unit-tests to that function.

Part of https://github.com/owncloud/core/issues/13221

Encryption fix key lost if group share gets renamed

Fix reshare permission issue

HHVM Workaround: Do not use Exception from Stream.

Use memcache for findBinaryPath

Works around https://github.com/facebook/hhvm/issues/2436#issuecomment-69351373

Add check if user is logged-in

Fix js error in personal settings if there is no password field

replace outdated 'shared' people icon with regular share icon as fallback

The actual share permissions sent to the server on reshare are now based
on possiblePermissions + permissions inherited from parent share

Trim leading or trailing slashes in file cache paths

Default to reusing etags in the scanner

It's slow, this makes it fast!

Use Doctrines filter by table name

fix rename field position, fix #12927

Otherwise a fatal PHP error is thrown since the filesystem is not setup:
```
( ! ) Fatal error: Call to a member function getOwner() on null in /Users/lreschke/Programming/core/lib/private/files/filesystem.php on line 817
Call Stack
1	0.0004	247792	{main}( )	../index.php:0
2	0.0946	5088776	OC::handleRequest( )	../index.php:28
3	0.1423	7491280	OC\Route\Router->match( )	../base.php:748
4	0.1664	8592152	call_user_func:{/Users/lreschke/Programming/core/lib/private/route/router.php:250} ( )	../router.php:250
5	0.1664	8592216	__lambda_func( )	../router.php:250
6	0.1665	8599064	require_once( '/Users/lreschke/Programming/core/apps/files_versions/ajax/getVersions.php' )	../route.php(135) : runtime-created function:1
7	0.1801	9061096	OCA\Files_Versions\Storage::getUidAndFilename( )	../getVersions.php:7
8	0.1801	9061144	OC\Files\Filesystem::getOwner( )	../storage.php:45
```

Furthermore this adds the CSRF check as a nice-to-have addition, the requests accessing this are done via the jQuery AJAX methods and thus the header is automatically added to all requests already.

Ldap user cleanup master

Verify existence of $_GET key

Otherwise when the file without any specified mimetype was accessed the error log was flooded with entries such as "Undefined index: mime", there can be multiple issues found about this in the forum and our bugtracker.

To test this access `/index.php/apps/files/ajax/mimeicon.php` with and without `$_GET['mime']`.

Fixes itself.

Verify whether type is correct

Logfile download

`$this->info` can very well contain an empty array or possibly other values. This means that when this code path is called a PHP Fatal error might get thrown which is not what we want.

Add timeout for notifications

Fix source path when share is a mount point

Minor typo updates to External Storage description

Add version to .htaccess

* options for timeout in seconds and if it contains HTML
* if timeout is 0 it will show the message permanently
* removes the notification after a given (default: 5 seconds) timeframe
* based on work by @brantje
* provide JS unit tests for notifications

Currently if a user does not replace the .htaccess file with the new update this can lead to serious problems in case Apache is used as webserver.

This commit adds the version to the .htaccess file and the update routine fails in case not the newest version is specified in there. This obviously means that every release has to update the version specified in .htaccess as well. But I see no better solution for it.

Conflicts:
	lib/private/updater.php

Whenever an external storage mount point is shared directly, its path is
empty which causes a leading slash to appear in the source path.

This fix removes the bogus leading slash in such situation.