remove old propagation logic

Execute only for web and not for CLI

Ensure trailing slash in URIs

Respect disabled incoming federated shares

Check if rewrite base is set if rewrite is active

Add quota behat test

Add metadata to post delete hooks

Allow DI for OCP\Files\IMimeTypeDetector

Check the expiration date for null

Only fetch the incoming federated shares if incoming shares are actually
enabled.

Fixes #20713

DI in avatar code

* DI in avatar code
* Use the node API
* More unit tests
* Unit tests no longer require DB

Required for routes that might otherwise collide with existing folders on the system

mod_rewrite as used by the front controller may require a `RewriteBase` in case the installation is done using an alias. Since we cannot enforce a writable `.htaccess` file this will move the `front_controller_active` environment variable into the main .htaccess file. If administrators decide to have this one not writable they can still enable this feature by setting the `front_controller_active` environment variable within the Apache config.

* null is always less than any value -> expirationDate gets null
  which is "no date set"
* ref https://github.com/owncloud/core/issues/20590#issuecomment-158393075

Support pretty URLs

This changeset allows ownCloud to run with pretty URLs, they will be used if mod_rewrite and mod_env are available. This means basically that the `index.php` in the URL is not shown to the user anymore.

Also the not deprecated functions to generate URLs have been modified to support this behaviour, old functions such as `filePath` will still behave as before for compatibility reasons.

Examples:
http://localhost/owncloud/index.php/s/AIDyKbxiRZWAAjP => http://localhost/owncloud/s/AIDyKbxiRZWAAjP
http://localhost/owncloud/index.php/apps/files/ => http://localhost/owncloud/apps/files/

Due to the way our CSS and JS is structured the .htaccess uses some hacks for the final result but could be worse... And I was just annoyed by all that users crying for the removal of `index.php` ;-)

Add code integrity checker foundation

Add command to get and set config for external mounts

Revert "Fix column width of mtime column"

Fix the docs of the exceptions and remove hardcoded language from the…

Make autotest.sh able to output proper coverage again