ports/180444: Update www/mod_rivet port to latest version

[edwin at FreeBSD.org]

Synopsis: Update www/mod_rivet port to latest version

Responsible-Changed-From-To: freebsd-ports-bugs->apache
Responsible-Changed-By: edwin
Responsible-Changed-When: Wed Jul 10 20:41:59 UTC 2013
Responsible-Changed-Why: 
apache@ wants this port PRs (via the GNATS Auto Assign Tool)

http://www.freebsd.org/cgi/query-pr.cgi?pr=180444