finished self-implementation of DNS resolver recursion; will now remove all that!

finished self-implementation of DNS resolver recursion; will now remove all that!

implemented resolving that avoids caching by creating non-recursive queries
that are directly talking to different name servers; will remove this now
because firewalls might prevent direct communication and do not want to
self-implement dnssec some time.
--> now remove own implementation of recursion in resolving and try to deal
    with cached results