Signed-off-by: Julius Härtl <jus@bitgrid.net>

Ref owncloud/core#25518

- check if all changes to a file happened after the fork, this allows the authors to check if the file can be relicensed to AGPLv3 or later

This commit consists of patches automatically generated for this project on https://scrutinizer-ci.com

* ignores the first lines of a file with the license header

properly break after the first comment ends + allow to pass in one file/folder via commandline argument