[tex-live] metapost

[Thomas Esser]

[talking about MPINPUTS.metafun = .;$TEXMF/metapost/{context,plain,}//]
> actually metafun *is* a format and the last couple of years the metapost 
> directory has expanded steadily
> 
> also, there are some ideas about extending mp, so ...

Well, there is no diffrence between what you have sugested and
  .;$TEXMF/metapost//
as long as the file names below metapost// are unique. Let's better try
to keep using unique filenames rather than introducing complicated search
paths without any need.

Thomas