Possibility to support ssh:// protocol?

[nekopep]

Hello,
I've successfully managed to clone https:// repository specifying user and password like https://user:password@myrepo.
Sadly i can't manage to clone my repo with ssh key (preloaded with ssh-add).
Is it hard to add ssh protocol support?
Can you provide some hint on how to add support for it?

[mnauw]

Using a url of the form hg::ssh://xyz should work (or so it does in some local testing).