pfPorts/dnsmasq-no-iscp-dhcp-parser: dnsmasq to 2.6.6 (FreeBSD Ports r315998)

Upstream message:
Update to new upstream release 2.66.
New DHCPv6 stuff, ability to act as authoritative server for local data.

Changelog: http://www.thekelleys.org.uk/dnsmasq/CHANGELOG

pfSense note:
- Ignores: "Drop default options, to keep the Makefile tidy." (r313925)
  - We rely on default options for our builds, thus we need them.
- This commit actually combines ith "Tidy up Makefile header." (r313926)
pfPorts/dnsmasq-no-isc-dhcp-parser: Small sync with FreeBSD ports (to r315999)

This combines not upstream-version related changes to the ports and contains:

- Kill blank line at EOF, to please portlint. (r315999)
- Convert dns to USES=pkgconfig (r316315)
- Convert USE_GETTEXT -> USES=gettext (r316620)

pfSense note:
The only difference remaining is that we provide default options for
our builds, that's all.
Merge pull request #105 from matsimon/dnsmasq_2.66+sync

Dnsmasq 2.66+sync