remote, #528: Improved way of listing URLs
remote, #528: Improved way of listing URLs

+ Instead of using `git remote show` that may triggers connection to
remote repo, use `git remote get-url --all` that works by only
reading the `.git/config`.
+ Change should have no functional impact, so no test needed.
+ Works only with git -2.7+.

Signed-off-by: Guyzmo <3d305ad602b1516be69a596ef9c3df266f23d6f4@m0g.net>

jeblair/GitPython,gitpython-developers/gitpython,nvie/GitPython,jeblair/GitPython,gitpython-developers/gitpython,gitpython-developers/GitPython,breavo/GitPython,breavo/GitPython,nvie/GitPython,gitpython-developers/GitPython