Yes, indeed this was intentional. Reasons were pointed out over here:

http://lists.ipfire.org/pipermail/documentation/2013-August/000349.html

On Tue, 2013-08-06 at 15:09 +0200, SCHUH Karl, SCHUH-TV wrote:
> @ Michael
> I do not know if you were watching the discussions on the documentation mailing-list. 
> 
> I just translated the wiki-page  http://wiki.ipfire.org/en/configuration/network/dnsforward  and after a few minutes the original version was gone and replaced by a very short, and incomplete at the moment, new version. According to Erik, this page had needed translation urgently. So please tell me if this was a mistake or if the old page was for an outdated version, or ....?

I wasn't aware of that we are doing translation, when an article has not
even been finished, yet.

-Michael