[9fans] new version of sendmail for Japanese mail

[9fans] new version of sendmail for Japanese mail

[okamoto]

I updated sendmail of upas system for sending/receiving
Japanese email, and put it on 
http://basalt.cias.osakafu-u.ac.jp/plan9/p9index.html.

The new features are:

1) for local mail within Plan 9 or for the case to use unicode
     intentianally in outside mail, don't put a line of
     Content-Type: text/plain; charset=iso-2022-jp.
     Then, unicode mail would be sent.

2) Don't use /mail/box/$user/pipeto file anymore.

3) if incoming mail having a line of
     Content-Type: text/plain; charset=iso-2022-jp,
     it'll be translated to unicode(utf-8) automatically,
     and sent to user's mail box.

4) this new version treat JIS encoded Subject line by
     using base64 encoding for both of incoming/outgoing
     mail, if those have a line of Content-Type mentined
     above(3).

Kenji