To speed up tests/gss/check-gssmask we need to remove the `sleep 10`
found there, and to do that we need to make the gssmask daemons use
roken_detach_prep()/roken_detach_finish(), and to do that we need to
split up mini_inetd_addrinfo().
This commit authored by Claude with human guidance and review.
771fb1c367