Fix for bug 26194: There are now substitution parameters available for use in newchan...

Fix for bug 26194: There are now substitution parameters available for use in newchangedmail which will include the reason(s)
that the person is receiving the mail in either an email header, the body of the message, or both.  The default newchangedmail
parameter includes these in it.  If you have an existing installation you will need to either hit "reset" next to the
newchangedmail parameter, or add the substitution parameters where you like them according to the instructions given in
editparams.cgi viewed from the web.
Patch by Matthew Tuck <matty@chariot.net.au> and Zach Lipton <zach@zachlipton.com>
r= justdave@syndicomm.com