AP_MPM_WANT_SIGNAL_SERVER   45 server/mpm/experimental/event/mpm.h #define AP_MPM_WANT_SIGNAL_SERVER
AP_MPM_WANT_SIGNAL_SERVER   47 server/mpm/prefork/mpm.h #define AP_MPM_WANT_SIGNAL_SERVER
AP_MPM_WANT_SIGNAL_SERVER   45 server/mpm/worker/mpm.h #define AP_MPM_WANT_SIGNAL_SERVER