patch for /usr/bin/mail

[Pete French]

> For what it's worth: note that Outlook, by default, uses semi-colon as
> its delimiter between addresses in To/Cc/Bcc fields.  The SMTP portion
> of the Exchange interface might turn these into commas though, but I'm
> not 100% certain (I'd have to manually check -- let me know if you want
> me to).

It would be inetersting to see what the arrive as when they have been
written onto a FreeBSd hhost by the mail transport certainly! That might
actually be the source of this bug if they come out with commas
but no spaces.

cheers,

-pete.