repo already special-cases sso:// URLs to behave similarly to https://
and rpc:// elsewhere in repo, but it forgot to do so here.
Noticed when trying to use relative URLs in a manifest obtained using
an sso:// URL.
Change-Id: Ia11469a09bbd6e444dbc4f22c82f9bbe9f5fd083
Repo is a tool built on top of Git. Repo helps manage many Git repositories,
does the uploads to revision control systems, and automates parts of the
development workflow. Repo is not meant to replace Git, only to make it
easier to work with Git. The repo command is an executable Python script
that you can put anywhere in your path.