Close client connection and log the event when the client input buffer reaches 1GB.

src/redis.c

@@ -843,6 +843,7 @@ void initServerConfig() {
     server.dbnum = REDIS_DEFAULT_DBNUM;
     server.verbosity = REDIS_VERBOSE;
     server.maxidletime = REDIS_MAXIDLETIME;
+    server.client_max_querybuf_len = REDIS_MAX_QUERYBUF_LEN;
     server.saveparams = NULL;
     server.loading = 0;
     server.logfile = NULL; /* NULL = log on standard output */