Merge request for ipblocklist

Hello Peter, hello list followers,

this is a merge request for the ipblocklist feature to get part of core update 170.

The development for the main parts has been done, the feature works stable and several testing feedback for the testing releases is available.

I've rebased the branch against the current next and pushed it into my personal git repository as "ipblocklist-final".

Peter please have a look on it and if everything is okay, please merge it so we finally can release it.

Thanks in advance,

-Stefan