evdns_getaddrinfo_cb 4151 opal/mca/event/libevent2022/libevent/evdns.c 	evdns_getaddrinfo_cb user_cb;
evdns_getaddrinfo_cb 4537 opal/mca/event/libevent2022/libevent/evdns.c     evdns_getaddrinfo_cb cb, void *arg)
evdns_getaddrinfo_cb  607 opal/mca/event/libevent2022/libevent/include/event2/dns.h typedef void (*evdns_getaddrinfo_cb)(int result, struct evutil_addrinfo *res, void *arg);
evdns_getaddrinfo_cb  632 opal/mca/event/libevent2022/libevent/include/event2/dns.h     evdns_getaddrinfo_cb cb, void *arg);