This patch not needed for 7.2 onward as its been accepted into FreeBSD

*** FreeBSD-7.0/src/etc/mail/aliases	Tue Jun  7 05:41:20 2005
--- new-generic/src/etc/mail/aliases	Sat Sep 20 18:38:40 2008
***************
*** 11,16 ****
--- 11,17 ----
  #
  # See also RFC 2142, `MAILBOX NAMES FOR COMMON SERVICES, ROLES
  # AND FUNCTIONS', May 1997
+ #	http://tools.ietf.org/html/rfc2142
  
  # Pretty much everything else in this file points to "root", so
  # you would do well in either reading root's mailbox or forwarding

---------------
Subject: Re: bin/127510: Add URL
From: FreeBSD-gnats-submit@@FreeBSD.org
Date: Sat, 20 Sep 2008 17:20:02 GMT (19:20 CEST)
To: "Julian H. Stacey" <jhs@@berklix.org>

Thank you very much for your problem report.
It has the internal identification `bin/127510'.
The individual assigned to look at your
report is: freebsd-bugs. 

You can access the state of your problem report at any time
via this link:

http://www.freebsd.org/cgi/query-pr.cgi?pr=127510

>Category:       bin
>Responsible:    freebsd-bugs
>Synopsis:       Add URL
>Arrival-Date:   Sat Sep 20 17:20:02 UTC 2008