- Adding NSEC3 from given node separated (ns_put_nsec3_from_node())
- Adding covering NSEC3 separated (ns_put_covering_nsec3()).
- Function for creating wildcard child name
  (ns_wildcard_child_name()).
- Function for adding NSEC3 for non-existent wildcard child.

refs #425

- Separated code for creating NSEC3 name for given domain name.
- dnslib_zone_find_nsec3_for_name() now returns the found node
  and previous node in canonical order.
- Modified ns_put_nsec3_closest_encloser_proof() accordingly.

refs #425

refs #425

- Added function ns_put_nsec3_closest_encloser_proof().
- Functions ns_next_closer() and dnslib_zone_find_covering_nsec3()
  not implemented yet.

refs #425

refs #425

refs #425

- Added function dnslib_zone_find_nsec3_for_name() which
  hashes the given name and tries to find it in the NSEC3 tree.

- Added adjusting of node->nsec3_node.

refs #425

refs #425

refs #425

refs #425

- Retained OpenSSL and the NSEC3 functions using it.
- Debug output in NSEC3 functions.

refs #425

Conflicts:
	src/dnslib/debug.c
	src/server/name-server.c

refs #425

- Linking to libcrypto.
- Two other NSEC3 hashing functions, one using EVP API, one
  using low-level SHA API.
- Appropriate changes to server and nameserver.

Gives much better results (approx. 45kqps) than GnuTLS (10kqps),
  but still not enough.

refs #425

- Thread count set to 1.
- Counting time spent in NSEC3 hashing and in answering.

Results: avg. 100us in hashing, 4us in answering

refs #425

refs #425

refs #425

- Loading NSEC3 parameters from the zone apex.
- Checking if NSEC3 is enabled for the zone (parameters present).
- Getting NSEC3 parameters of the zone.

refs #425

refs #425

- Parsing NSEC3 parameters from NSEC3PARAM RR.
- SHA-1 hashing function.

refs #425

refs #425

- Corrected setting of AA bit (all cases except for referral).
- Corrected NSEC handling in case of NODATA (not duplicating
  NSEC RR).

refs #423

refs #423

refs #423

- Do nothing in case there is no NSEC records in the node.

refs #423

- Was not setting labels on the newly created domain name.

Fixes #531