Fix check if a path argument is passed to occ files:scan

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fixing wrong usage of license vs licence

degraded logging policy for server container in AppFramework

Fix JS asset generation

Merge pull request #13101 from owncloud/variable-is-undefined-please-use-a-proper-ide-in-the-future-whoever-did-that

Fix undefined variable and write unit tests for OC_Principal connector

At some point SeparatorFilter should be included upstream
(kriswallsmith/assetic), then lib/private/assetic/separatorfilter.php can be
removed and the `use` in lib/private/templatelayout.php rewritten.

SeparatorFilter inserts a separator between assets, preventing issues when
files are incorrectly terminated. For JS this is a semicolon.

escape . in htaccess regex for CSS and JS HTTP headers

Check for version before mounting a public link

Use info instead of warning log level

* ownCloud 7.0.0 is needed - version of merge of server <-> server
  sharing - https://github.com/owncloud/core/pull/8399
* adjust error message

Otherwise the log is flooded as can be seen at https://github.com/owncloud/core/issues/13106

Fixes https://github.com/owncloud/core/issues/13106

Remove unnecessary setUp method from provisioning_api

fix "app":"PHP","message":"Undefined variable: user at/principal.php#66"

changed variable #user to #name

Fix: X-Accel-Redirect did not support custom data dir and local mounts

Fix remaining unit tests for provisioning_api