Re: url.<base>.insteadOf vs. submodules

So, like, Junio C Hamano said:

Stefan Beller [off-list ref] writes:

quoted

Do we want to invent a special value for url.*.insteadOf to mean
  "look up in superproject, so I don't have to keep
  a copy that may get stale" ?

My gut feeling is that we should do the selective/filtered include
Peff mentioned when a repository is known to be used as a submodule
of somebody else.

Does the management of these submodue-related config values
become easier if, instead of placing them in .config, we
place them in a git/.context file?

jdl