worker_score in scoreboard.h needs a pid_t field. The worker MPM (and probably some other Unix threaded MPMs) has a perhaps-unexpected way of handling child processes which are terminating gracefully -- it allows new child processes to take over the process_score structure and the worker_score structure for all threads except for the ones handling long-running requests in the old child process.
Because there is not a pid_t field in worker_score, mod_status can't display the id of the process handling that particular request, which makes it difficult to determine which requests are being handled by some httpd process which is trying to terminate. So step 1 is add the pid_t field and bump MMN. Step 2 is to teach worker MPM to maintain it properly. Step 3 is to teach mod_status to check that field for non-zero (i.e., implemented by MPM) and , if set, use that instead of the process_score field. Any concerns?
