send_signal      1012 server/mpm_common.c             send_signal(otherpid, SIGTERM);
send_signal      1022 server/mpm_common.c             *exit_status = send_signal(otherpid, SIGHUP);
send_signal      1032 server/mpm_common.c             *exit_status = send_signal(otherpid, AP_SIG_GRACEFUL);
send_signal      1043 server/mpm_common.c             *exit_status = send_signal(otherpid, AP_SIG_GRACEFUL_STOP);