Caching of DNS RR should happen on the lowest possible layer, not within Smack:
- dnsjava does it's own caching
- resolving via the javax API should use the OS's caching (if any)
We don't need dozens layers of DNS RR caching.
Change all \r\n into unix style newlines. Add missing newlines at the
end of a file and activate the newline checkstyle module, that enforces
'\n' as newline and a newline at the end of every file.