docs/geek/contributing/pull-request: drop Gitlab and refer to Github
Our Gitlab probably is never going to be public for forks creation and now we mirror all our repositories to Github.com so we can just point users there.
Self sign-up has been disabled due to increased spam activity. If you want to get access, please send an email to a project owner (preferred) or at gitlab(at)nic(dot)cz. We apologize for the inconvenience.
Our Gitlab probably is never going to be public for forks creation and now we mirror all our repositories to Github.com so we can just point users there.