Anonymous multi-subs

Now that I've thought about it for 90 seconds (not fully-formed idea), if
one were to have an anonymous multi-sub, it ought to be constructed from a
list of *signature*, *body *pairs.

And/or, any non-finalized sub could have a method to add another *signature,
body* to its dispatch list.

apologies if this discussion is already captured in a design doc, I am
posting this without having read much of the past.

and now, back to our regularly scheduled programming.

-y