Support for safeurl.eu

Example link: http://safeurl.eu/FP
Merge remote-tracking branch 'devnoname120/safeurl.eu' into develop

close #503
close #505
Revert "short.pk"

This reverts commit 217fd6d456768de391ffe6eb837baa128003350e.
short.pk

Remove short.pk only.

close #501