Richard Coleman threw out a lot of old MH-specific files in nmh. Much of the

Richard Coleman threw out a lot of old MH-specific files in nmh.  Much of the
stuff, indeed, is not worth saving, but there are nuggets that are very
worthwhile, and should probably be added back in.  Most important, IMHO, are the
MH change logs, as they can help answer questions like "Why is this code like
this?" or "How long has this been broken?" or "What was this ever used for?"

I've added a new file to the nmh tree called ChangeLog_MH-3_to_MH-6.6.  It's
cobbled together from the mh-6.8.4/papers/mh*/MHCHANGES files.  I've re-ordered
the entries to go from newest at the top to oldest at the bottom to match the
ChangeLog convention.  Unfortunately there are no change logs for versions of MH
prior to 3 in the MH tar files available at <ftp://ftp.ics.uci.edu/pub/mh>.
Also, it appears to me that there are MH-6.6 changes that aren't documented in
the logs.

I've also added ChangeLog_MH-6.7.0_to_MH-6.8.4.html.  This is based on
mh-6.8.4/papers/changes/mh-changes.ms.  The nroff format and its "catman"-type
output are a pain to deal with, but I was loath to throw away the formatting, so
I converted the file to HTML.  The only actual markup in the body are the "<B>"
and "<U>" tags, and "&lt;" and "&gt;" instead of '<' and '>', so it's quite
doable to view the file in plain ASCII mode as well.  Note that some of the
changes this file documents as having been made in MH-6.8.4 may not be present
in nmh -- Richard started with 6.8.3 and later put in certain 6.8.4 stuff.