ipv6_addrs_IF aliases in rc.conf(5)

Hello,

I wrote a small patch for /etc/network.subr to add support for
ipv6_addrs_IF aliases in rc.conf(5) to match the already existing
ipv4_addrs_IF aliases for ipv4 addresses. With this patch the ipv6
aliases can be written like:

ipv6_addrs_re0="2001:db8:1111:2222::1/64 2001:db8:1111:2222::2/64"

Only this syntax is supported, it's not possible to use the "prefixlen
nn" syntax in the list.

The patch is against a recent 9-STABLE, last changed rev of
network.subr on my SVN checkout is r242187. I don't have a CURRENT
system to test if it applies to CURRENT as well.

The patch can be found attached to a PR I sent:

http://www.freebsd.org/cgi/query-pr.cgi?pr=174225


I wrote this patch inspired by a question on the FreeBSD forums:

http://forums.freebsd.org/showthread.php?t=36136

Please test and report if it works for you :)


Regards,
Kimmo Paasiala