Adding test helper to test private methods
Try to create datadirectory to test whether the .htaccess works

Fixes https://github.com/owncloud/core/pull/11299#issuecomment-56968588 and also https://github.com/owncloud/core/issues/10628 together with https://github.com/owncloud/core/pull/11299#issuecomment-56968588 when backported.
Clear up confusion of log_rotate_size config value

Remove the second comment which could be confused with suggesting an invalid value: `// 100 MiB`.

To keep the easily readable example value, it has been moved into the comment header for the config item.
Merge pull request #11335 from danbartram/imp_logrotate_conf_example

Clear up confusion of log_rotate_size config value
Merge pull request #11322 from owncloud/adding-unittest-helper

Adding test helper to test private methods
[tx-robot] updated from transifex
Merge pull request #11324 from owncloud/tryToCreateDatadirectory

Try to create datadirectory to test whether the .htaccess works
Added filesystem hooks for mount/unmount ext storage
Added failing unit tests for mount config hooks
Expose getAppKeys trough \OCP\IConfig
Fix add/remove mountpoint hooks
Add EtagPropagator to handle etag changes when external storages are changed
Hookup the etag propagator