Code change:
============
Add quotes around From: display name
in some cases.

Reject messages not having exactly
one From: field.

Debian messages in German,
by Hege Kreutzmann.


New parameter:
==============
still_allow_no_from when set prevents
rejecting as above.  Don't use it.


Bug fix:
========
Error message reading signing key
if the file name is too long.