hooks: add url to changegroup, incoming, prechangegroup, pretxnchangegroup hooks all repository classes now have url() method that returns url of repo.

#!/bin/sh

hg
hg -q
hg help
hg -q help
hg add -h
hg add --skjdfks
hg help diff
hg help status
hg -q help status
hg help foo
hg skjdfks

exit 0