Vacation and non-ASCII characters

[Mark Keasling]

Hi,

I have posted an almost identical patch as part of a suggested fix for
"[Bug 1723] Sieve notifications containing UTF-8 are not MIME encoded"
though no one seems to be doing anything with it.  I added a check to
see if the reason contained 8bit and added the headers in only that case.
I saw no need to label something with only ASCII as UTF-8.

Fixing notifications with out also fixing vacation as well seemed to be
silly; though, I probably should have filed it as a separate bug.  There
are several other "internationalization" issues with sieve scripts as
well as the sieve/lmtpd generated notification and vacation messages.
They are documented in Bugzilla: #1710, #1721 - #1725.  These probably
aren't exhaustive; but, reflect only the problems that have been reported
to me.

Regards,
Mark Keasling <mark at air.co.jp>