SO_BINDANY and pf divert

[Attila Nagy]

Hello,

OpenBSD's relayd has grown a very useful transparent relay support, 
which means you can run a HTTP(S) reverse proxy transparently 
(maintaining the source IP, while you have a different TCP stream open 
from the proxy to the backend, even by terminating the SSL part and 
speaking clear text HTTP to the backends).

For this (as far as I could figure out, while trying to make this newer 
relayd working on FreeBSD) two pieces are needed, which FreeBSD 
currently lacks:
- the SO_BINDANY support (see 
http://marc.info/?l=openbsd-cvs&m=121030159009823&w=2 and 
http://www.openbsd.org/cgi-bin/man.cgi?query=setsockopt)
- the pf part, which diverts the non-local packets to the given socket 
(see http://marc.info/?l=openbsd-cvs&m=121030115209292&w=2 and 
http://www.openbsd.org/cgi-bin/man.cgi?query=pf.conf)

After having those said, the question is obvious. :)
Does anybody feel the need for these two in FreeBSD and have the 
competence and time to port them?

Thanks,