<draft-ietf-dhc-dhcp-dns-12.txt>.

common/options.c, common/tables.c, includes/dhcp.h:
  Split the fqdn.name option into fqdn.hostname and fqdn.domainname.

includes/dhcpd.h, server/Makefile.dist, server/ddns.c, server/dhcp.c,
server/mdb.c, server/stables.c:
  Added a new file (server/ddns.c) containing the DDNS updates code.
  This file exports two functions: ddns_updates() and ddns_removals().
  ddns_updates() is called when a lease is granted, and ddns_removals()
  is called when the lease expires or is released.

server/dhcpd.c:
  Remove the previous DDNS update code, and add default code for the
  ddns-hostname, ddns-domainname, ddns-ttl, and ddns-rev-domainname
  server options.