[Patches] Unix Mailboxes don't work quite right.

[John Viega]

The method "_isrealfromline" in mailbox.UnixMailbox doesn't handle some
real email messages.  I've noticed this by comparing Python's notion of
a Mailbox with that of real mailers.  In this particular case, one of my
real mailboxes has several messages without a time zone offset included,
and Python doesn't treat those from lines as the start of a message.

I've looked around, and it seems that real mailers seem to treat any
sequence of "\nFrom " as a from line.

With that in mind, I'd suggest the following changes:

Delete lines 104-113.
Change "_isrealfromline" to:

def _isrealfromline(self, line): return 1

If people want the original behavior for whatever reason, they can
override it, but this change would make Python much more compatible with
mailers, etc.

John