Use absolute paths in addremove.
This is more consistent with other places in the code, which only use
the "relpath" returned by cmdutil.walk for display purposes.
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
destination directory: q
abort: destination 'q' already exists