APR_OPTIONAL_HOOK  230 include/ap_config.h         APR_OPTIONAL_HOOK(ap,name,fn,pre,succ,order)
APR_OPTIONAL_HOOK 2287 modules/proxy/mod_proxy.c     APR_OPTIONAL_HOOK(ap, status_hook, proxy_status_hook, NULL, NULL,
APR_OPTIONAL_HOOK  430 modules/proxy/mod_proxy.h         APR_OPTIONAL_HOOK(proxy,name,fn,pre,succ,order)
APR_OPTIONAL_HOOK  173 modules/ssl/ssl_scache.c     APR_OPTIONAL_HOOK(ap, status_hook, ssl_ext_status_hook, NULL, NULL,
APR_OPTIONAL_HOOK 3984 server/core.c      APR_OPTIONAL_HOOK(proxy, create_req, core_create_proxy_req, NULL, NULL,