Do not check all chunks of a chunked upload if we do not need to

Remove disabled autocorrect for new file names

Add XMLReader as requirement

[3rdparty] Bump symfony/polyfill-php* to 1.1.0

Select queries in the default share provider should query for file/folder

Public link share disabled if password length is equal to 0

Fix capabilities intergration tests

Fix compatibility with PHP 5.4

Use HTTPClient instead of file_get_contents

Use "hasKey" instead of checking the value

There can be leftover calendar and contacts shares in the oc_share
table. We need to filter those out properly.

The SabreDAV release in 9.0 requires XMLReader, while this is usually compiled in by default some distributions like Gentoo don't.

Without this ownCloud gives a fatal 500 error instead of telling people to enable XMLReader.

Fixes https://github.com/owncloud/core/issues/23003

* ref #22784

If the check is negative it would depending on the used cache store the value as an empty string. When reading the value this check would thus return "false" even if a value exists.

Allows us to catch exceptions like 404's and thus prevents stuff like:

```
{"reqId":"fnmS0hc+fL4+WXKAruo5","remoteAddr":"192.168.39.100","app":"PHP","message":"file_get_contents(http:\/\/ckamm.blaucloud.de\/\/status.php): failed to open stream: HTTP request failed! HTTP\/1.1 404 Not Found\r\n at \/var\/www\/owncloud\/apps\/files_sharing\/lib\/external\/storage.php#260","level":3,"time":"2016-03-08T21:00:33+00:00","method":"PROPFIND","url":"\/remote.php\/webdav\/"}
```

Fix share mounting recursion

Fixes https://github.com/owncloud/core/issues/22960

Split the array element selection and the member selection.

Fix migration of group shared calendars and addressbooks

Delete empty file

don't hide server not available exception, fixes #20536

Show version to update to properly

Cleanup OCS Share Api

Remove double URL encoding

Initialize submodules for Scrutinizer as well

* Unit tests for OC_Filechunking to verify the isComplete function
* Intergration tests to show that shuffling chunks is all fine

Scrutinizer otherwise complains about the fact that some classes are undefined etc.

Let's see whether that works 

Fixes #22601

Before we did a full test on all chunks to verify if a chunked upload
was completed. This is unneeded since if we are missing one chunk we can
already fail.

Also we look from back to front since it is much more likely that we
find a missing chunk thus can error out early.

ZipStreamer as bundled with 9.0 will properly encode the filename already.

Fixes https://github.com/owncloud/core/issues/22836#issuecomment-193336245

improve log output when no LDAP user was found on login attempt

Handle calendar migration issue by writing the faulty event to the lo…

The code to get a share by id is somewhat messy. And was duplicated.
Now this is done is a separate function