Git over `ssh://` tracking issue

[dnbln]

[dnbln]

Status update

The following commits: 15c0685..0acdc22 (diff) implement a very basic ssh server that git clients can clone from, but some more work is needed for it to be usable (including checking whether it is using the ssh protocol properly).

Note that git-shell is not present in git-for-windows, and therefore this will not be supported on windows.