*DB upgrade*

yet for drupal 5.x)

so change link in email to point to privatemsg and redirect to user/login
if needed.

[quote] type quoting instead of > indents

Fix so Move to folder controls are shown.

based on patch from jaxxed

avoid duplicates and extra noise when there are other messages.

Added as a user option, so any user can turn this off.
Also omit (0) after "my inbox" in menu link if there are no new messages.

privatemsg, to avoid error if not logged in (if already logged in, drupal
will redirect right to privatemsg)