Comment 0 for bug 266583

this patch checks subject: line for being mime-encoded
with charset, and if this the case, decodes is for the
purpose of prefix checking.

this avoids replies with subject
encoded( Re: [listname] old subject.. )

to be converted to
[listname] encoded( Re: [listname] old subject...)

ad infinitum.

patch originally developed by vaget at vaget dot org
and beautified by me.

[http://sourceforge.net/tracker/index.php?func=detail&aid=528031&group_id=103&atid=300103]