docs/31109: replace gif images w/ png ones due to patent license

[Joseph Scott]

The following reply was made to PR docs/31109; it has been noted by GNATS.

From: Joseph Scott <joseph at randomnetworks.com>
To: clefevre at citeweb.net, freebsd-gnats-submit at FreeBSD.org,
	freebsd-docs at FreeBSD.org
Cc:  
Subject: Re: docs/31109: replace gif images w/ png ones due to patent license
Date: Sat, 24 Jul 2004 21:59:11 -0700

 	Given that the GIF patent has expired does this PR still need to be 
 open?
 
 --
 Joseph Scott
 http://joseph.randomnetworks.com/