Don't process relative links that start with slash
This should fix https://github.com/gitlabhq/gitlabhq/issues/8855
This merge/pull request is a continuation of https://github.com/gitlabhq/gitlabhq/pull/9614
This should fix https://github.com/gitlabhq/gitlabhq/issues/8855
This merge/pull request is a continuation of https://github.com/gitlabhq/gitlabhq/pull/9614