documentation: reply-to munging "useful" link now points to a spam domain

[Sander]

http://bazaar.launchpad.net/~mailman-coders/mailman/2.1/annotate/head:/doc/mailman-admin/node11.html line 86 includes a link, "Reply-To Munging Considered Useful", pointing to metasystema.org/essays/reply-to-useful.mhtml
archive.org shows this document disappeared sometime between late 2013 and mid-2014, and if it's currently visited, your browser gets redirected through a large number of what I can only assume to be spam domains.

I don't know if there's any policy for what to do with dead links in documentation, but a faithful reproduction of the document seems to live on http://marc.merlins.org/netrants/reply-to-useful.html (unchanged for the last 11 years based on a swift visual inspection via archive.org), so updating the link to point there seems to make sense.

[Mark Sapiro (msapiro)]

The source for all these documents is the branch at <https://launchpad.net/mailman-administrivia/>. This particular issue was fixed in rev 117 of that branch on 2 March 2015. Unfortunately, the process of rebuilding the docs from the .tex source following that change appears to have been overlooked.

Thanks for your report.

I will fix it.