git-bare: New script for setting config values in bare/non-bare repos

9df91894-2962-11e3-b4c8-001f3b596ec9
mkrepo: Add -r/--rsyncnet-remote option

ce9e0da4-2973-11e3-9254-001f3b596ec9
252b371e-2974-11e3-80af-001f3b596ec9