Charset headers on Wiki-generated emails

I've just hacked up the code that generates lost-password e-mails and
user-to-user e-mails to note the character set in the headers. Please
test that this works correctly; particularly for the various utf-8 wikis
(Polish, Japanese, etc).

-- brion vibber (brion @ pobox.com)

signature.asc
Description: This is a digitally signed message part