Revision 446785

dns/nsd: Update to 4.1.17

Features:
- zone parser parses type AVC (it has TXT format).
- Fix #1272: use writev to put tcp length field with data for outgoing
  zone transfer requests.

Bugfixes:
- Fix potential null pointer in nsec3 adjustment tree.
- Fix text format of deletes for CDS and CDNSKEY, single 0 to represent
  empty base64 or hex string.

PR:		220939
Submitted by:	jaap@NLnetLabs.nl (maintainer)