Does smart-http need git-daemon-export-ok?

Hi all,

Should the git-http-backend check something like git-daemon-export-ok
before serving a repository?  It would have been better to discuss
this a month or two ago, but it's probably not too late since
smart-http is still so new in released versions.

I think it's very similar to git-daemon which requires that to be set,
and I think the same arguments could be made for the same kind of
check.  There are already parallels for the upload-pack and
receive-pack services between the two.

Just as git-daemon may be invoked with --export-all, for
git-http-backend we could have an environmental variable to export all
repositories.

Thoughts?

Thanks,
Tarmigan