Merge branch 'mb/local-clone-after-applying-insteadof'

Apply the "if cloning from a local disk, physically copy repository using hardlinks, unless otherwise told not to with --no-local" optimization when url.*.insteadOf mechanism rewrites a "git clone $URL" that refers to a repository over the network to a clone from a local disk. * mb/local-clone-after-applying-insteadof: use local cloning if insteadOf makes a local URL