Log Message:
Update to 16 (as 0.9.16). From the changelog:

- 19961114 change: dns_ip() now recognizes [1.2.3.4] and [f80::a]. tnx DS.
- scan_long() included for mess822x support.
- constmap() added from qmail.
- Changed ipv4/6-localhost and ipv4/6-loopback to
  ip4/6-localhost and ip4/6-loopback.