profiling: honor limit in json rule output

src/util-profiling-rules.c

@@ -307,7 +307,7 @@ static void DumpJson(FILE *fp, SCProfileSummary *summary, uint32_t count, uint64
     CreateIsoTimeString(&tval, timebuf, sizeof(timebuf));
     json_object_set_new(js, "timestamp", json_string(timebuf));
 
-    for (i = 0; i < count; i++) {
+    for (i = 0; i < MIN(count, profiling_rules_limit); i++) {
         /* Stop dumping when we hit our first rule with 0 checks.  Due
          * to sorting this will be the beginning of all the rules with
          * 0 checks. */

suricata.yaml.in

@@ -1416,7 +1416,7 @@ profiling:
     # Sort options: ticks, avgticks, checks, matches, maxticks
     sort: avgticks
 
-    # Limit the number of items printed at exit (ignored for json).
+    # Limit the number of sids for which stats are shown at exit.
     limit: 100
 
     # output to json