[MHA] Subject prefix

I've had a couple of requests over the past few months to prepend a
list identifier to the Subject: header on messages sent through
the list to aid in filtering and identification.

Consequently, some time after 5:00pm on Thursday, August 12th (those
times are US/Central) all messages will have [MHA] in the subject.

For those of you archiving the list, the identifier can be removed
by adding this to your rc file:

   <SUBJECTSTRIPCODE>
      s/\[MHA\]//g;
   </SUBJECTSTRIPCODE>

If you don't want to see the identifier, it can also be removed with
this procmail recipe (assuming that your mail is delivered on a system
with procmail as the local delivery agent or where it can be invoked
via a .forward file):

   :0
   * ^Subject: \/.*[MHA].*
   {
      SUBJECT=`echo $MATCH | sed 's/\[MHA\]//'`

      :0fhw
      | formail -I "Subject: $SUBJECT"
   }

See PROCMAIL(1) and PROCMAILRC(5) if this doesn't make sense.  

Chris