bug#1318: document footnote-mode

[jidanni]

mr> bugs.  Please have a look, for example, via
mr> cvs -z3 -d:pserver:anonymous@cvs.savannah.gnu.org:/cvsroot/emacs co 
emacs/lisp/mail/footnote.el
(Say. What if one is reading this mail on a Windows machine at the
public library (where there is a waiting line of people and one only
has 30 minutes)... Hope there is also a HTTP address.)
OK, I managed to use cvs.

Say, perhaps make it a pure UTF-8 file, changing the latin-1 hardwired stuff.

>> Also hardwiring them here often looses track of the complete list.
>> Perhaps just mention the most often used and say that is all you
>> are mentioning.

mr> What do you mean by "hardwiring" here?

If you just dumped the C-c ! map, then you wouldn't need any
"\\[Footnote....] Footnote..." lines. (But then you couldn't order them
exactly. OK, never mind. Thanks.)