twstat was serializing the qid in the wrong order. While here, add a comment before the qid definition too.

This is the counterpart for the recent kamid commit about wstat: we're lacking the leading size field.

Trying to maintain two branches was impossible at this stage for me alone, so I'll recognize my stupidity and merge the portable branch into the main one. The repository will build using autotools.

use by default the OpenBSD mk infrastructure to build and test all the kamid components.