The tests are still there, the suite is equivalent to the old one, but this one is better structured. The biggest annoyance I had with the old one was that it wasn't straightforward to test only a specific set of tests. It's still impossible, but it's way easier to do it now. This extract all the tests to their own functions. It's overall better in all possible regards.

Error and warning messages are prefixed with "error: " and "warning: " correspondingly to ease integration with automated tooling. `yywarn' function added. Off-by-one line numbers in warnings are fixed. Two error messages are reworded to avoid repeating like "error: error in server directive" or "error: syntax error".

copy it to `/etc/rc.d`, write your config in `/etc/gmid.conf` and launch using `rcctl enable gmid && rcctl start gmid`.

and while there reorder the targets in the Makefile a bit

got doesn't seem to match (say) compat/freezero.o with *.o