IDN support for e-mail messages. Things should work automagically
once you have the GNU IDN library available from ftp://alpha.gnu.org/pub/gnu/libidn/ installed. For IDN's which
can't be losslessly recoded to your local character set, mutt should
automatically fall back to using the ASCII representation. There's
probably a considerable number of bugs in this, and the code may, at
this point, not even compile on machines without libidn. Will start
working on that ASAP.
