misfeature in MIME-Version definition

It would be better if the MIME-Version were an RFC-822 phrase instead of
having as BNF 1*token (it's the only thing with that BNF).  That way extant
phrase parsing code can be used, and we can have:
        MIME-Version: 1.0
instead of
        MIME-Version: "1.0"

I really *hate* having periods as specials!