"git -c web.browser=w3m help -w help" still kicks firefox

[Junio C Hamano <gitster@pobox.com>]

My firefox runs in a different "workspace" than what I usually look at
while working, and I've beem scratching my head why "git help -w help"
doesn't seem to do anything, while I was opening a new tab every time I
tried it.  And then I tried the command on the Subject line, only to end
up with yet another new tab X-<.

I know exactly why this happens---we save the config from the command line
on a list only so that we can apply them in the correct order after items
coming from files, but we do not use the saved values to pass them around
to sub-git invocations.

  8b1fa77 (Allow passing of configuration parameters in the command line, 2010-03-26)

A "trivial fix" would be to pass this info through the execv_git_cmd()
interface by either exporting it via an environment variable or by
modifying the command line options, but I am not sure about the possible
fallouts from such a change.  For example, does "git -c var=value config ..."
work sensibly when what "config" is told to do (say, remove a section)
contradicts with having the named var with a given value?

I am wondering if this is worth fixing it in the first place.

Opinions?  Patches ;-)?