check_ntp(_time): don't die on connect errors

connect errors may happen if clients check agains dual
stacked ipv4/6 ntp servers.

plugins/check_ntp.c

@@ -398,7 +398,11 @@ double offset_request(const char *host, int *status){
 			die(STATE_UNKNOWN, "can not create new socket");
 		}
 		if(connect(socklist[i], ai_tmp->ai_addr, ai_tmp->ai_addrlen)){
-			die(STATE_UNKNOWN, "can't create socket connection");
+			/* don't die here, because it is enough if there is one server
+			   answering in time. This also would break for dual ipv4/6 stacked
+			   ntp servers when the client only supports on of them.
+			 */
+			DBG(printf("can't create socket connection on peer %i: %s\n", i, strerror(errno)));
 		} else {
 			ufds[i].fd=socklist[i];
 			ufds[i].events=POLLIN;

plugins/check_ntp_time.c

@@ -344,7 +344,11 @@ double offset_request(const char *host, int *status){
 			die(STATE_UNKNOWN, "can not create new socket");
 		}
 		if(connect(socklist[i], ai_tmp->ai_addr, ai_tmp->ai_addrlen)){
-			die(STATE_UNKNOWN, "can't create socket connection");
+			/* don't die here, because it is enough if there is one server
+			   answering in time. This also would break for dual ipv4/6 stacked
+			   ntp servers when the client only supports on of them.
+			 */
+			DBG(printf("can't create socket connection on peer %i: %s\n", i, strerror(errno)));
 		} else {
 			ufds[i].fd=socklist[i];
 			ufds[i].events=POLLIN;