refs #5, #88

Fixed creating dname struct from wire format (was not copying).
refs #5, #88

- creating dname (empty, from string, from wire format)
- deleting dname
- converting dname to string

Minor change in node - added linked list pointer to next node.

refs #5, #88

refs #5, #88

refs #5

* Test now detects invalid number of parameters.

Tests for server unit.
TAP protocol output.

- No epoll and master thread
- Workers are racing on recvfrom()
- Workers are natively blocked by recvfrom()
- Zero synchronisation overhead
- Presuming recfrom() is thread-safe

When processing DNAME, the actual qname should be used instead of
  the one from the query (e.g. when after CNAME).
Saving the actual qname before stripping and using it in DNAME and
  wildcard processing.

There are probably multiple bugs, needs a lot of testing and
  revision of the algorithm.
However, it should mirror the current state of the flowchart
  (230910-my).