M-label definition

[Eric Brunner-Williams]

Paul Hoffman wrote:
> ...
> It may be a good time for some to start listing the proposals

Over the lifetime of -bis several contributors have suggested mapping 
something, and I recall at least one garnering a "there is no mapping in 
this [2008] protocol" response.

I'm not suggesting a mind-numbing grovel through the -bis mailing list 
archive, but the prior tentative proposals that anyone does recall could 
be checked for reasonableness on look-up. Its not so much the change 
that is in the front of our minds, its the changes we dismissed and 
managed to dismiss the memory of as well that could be checked.

Eric