windows: scp-style “URIs” are not local
GitLab and GitHub output something like this for the SSH location:
git@github.com:hg-git/hg-git.github.com.git
Previously, cloning and pulling from them on Windows didn't work, as
the path was reinterpreted as a local path, made absolute and then
saved into .hgrc
. The same happened on pull, even if you corrected
the definition.
Fixes #335 (closed).