[core] check if EAI_ADDRFAMILY is defined

(EAI_ADDRFAMILY is not available on FreeBSD)

src/network.c

@@ -282,7 +282,11 @@ static int network_server_init(server *srv, buffer *host_token, specific_config
 
 			if (0 != (r = getaddrinfo(host, NULL, &hints, &res))) {
 				hints.ai_family = AF_INET;
-				if (EAI_ADDRFAMILY == r && 0 == getaddrinfo(host, NULL, &hints, &res)) {
+				if (
+				  #ifdef EAI_ADDRFAMILY
+				    EAI_ADDRFAMILY == r &&
+				  #endif
+				    0 == getaddrinfo(host, NULL, &hints, &res)) {
 					memcpy(&srv_socket->addr.ipv4, res->ai_addr, res->ai_addrlen);
 					srv_socket->addr.ipv4.sin_family = AF_INET;
 					srv_socket->addr.ipv4.sin_port = htons(port);