Git doesn't seem to properly support having cinnabar submodules

[staktrace]

mkdir git_super_repo
cd git_super_repo
git init .
git submodule add hg::https://hg.mozilla.org/l10n-central/ace

This produces a fatal: transport 'hg' not allowed error.

Similarly, if I do this instead:

mkdir git_super_repo
cd git_super_repo
git init .
git clone hg::https://hg.mozilla.org/l10n-central/ace
git submodule add ./ace
git submodule update --remote

The last update step fails with the same transport 'hg' not allowed error.

I guess a workaround for doing git submodule update --remote would be to just cd ace && git pull but it would be nice if the standard submodule commands worked.

[glandium]

This is not something git cinnabar can do anything about on its own. See https://git-scm.com/docs/git-config#Documentation/git-config.txt-protocolallow