add util.samestat function for windows.
windows does not have os.path.samestat, and stat().st_ino is always zero,
so util.samestat always returns false on windows.
abort: repository a not found!
255
abort: error: Connection refused
255
abort: repository a not found!
255
abort: destination '../a' already exists
255
abort: repository a not found!
255
abort: destination 'q' already exists