Elevate log level to warning for situation when socket limit is hit.

ChangeLog.txt

@@ -1,3 +1,10 @@
+1.5.3 - 201810xx
+================
+
+Broker:
+- Elevate log level to warning for situation when socket limit is hit.
+
+
 1.5.2 - 20180919
 ================
 

src/net.c

@@ -136,7 +136,7 @@ int net__socket_accept(struct mosquitto_db *db, mosq_sock_t listensock)
 				COMPAT_CLOSE(new_sock);
 			}
 			spare_sock = socket(AF_INET, SOCK_STREAM, 0);
-			log__printf(NULL, MOSQ_LOG_NOTICE,
+			log__printf(NULL, MOSQ_LOG_WARNING,
 					"Unable to accept new connection, system socket count has been exceeded. Try increasing \"ulimit -n\" or equivalent.");
 		}
 		return -1;