Allow setting alias port ranges in libalias and ipfw. Along with r357092, this will allow a system to be a true RFC 6598 NAT444 setup, where each network segment (e.g. user, subnet) can have their own dedicated port aliasing ranges.
Submitted by: Neel Chauhan <neel AT neelc DOT org>
Patch is in the Phabricator URL associated with this PR.