Merge branch 'ps/guess-repo-name-at-root'

"git clone $URL", when cloning from a site whose sole purpose is to host a single repository (hence, no path after <scheme>://<site>/), tried to use the site name as the new repository name, but did not remove username or password when <site> part was of the form <user>@<pass>:<host>. The code is taught to redact these. * ps/guess-repo-name-at-root: clone: abort if no dir name could be guessed clone: do not use port number as dir name clone: do not include authentication data in guessed dir