MINOR: mux-h2/show_fd: report as suspicious an entry with too many calls

An FD entry that maps to an H2C connection whose last stream was woken
up more than 1M times is now flagged as suspicious.
diff --git a/src/mux_h2.c b/src/mux_h2.c
index 2fbf196..fd03ea8 100644
--- a/src/mux_h2.c
+++ b/src/mux_h2.c
@@ -6202,9 +6202,10 @@
 	int tree_cnt = 0;
 	int orph_cnt = 0;
 	struct buffer *hmbuf, *tmbuf;
+	int ret = 0;
 
 	if (!h2c)
-		return 0;
+		return ret;
 
 	list_for_each_entry(h2s, &h2c->fctl_list, list)
 		fctl_cnt++;
@@ -6257,12 +6258,14 @@
 				chunk_appendf(&trash, " tl.calls=%d tl.ctx=%p tl.fct=",
 					      h2s->subs->tasklet->calls,
 					      h2s->subs->tasklet->context);
+				if (h2s->subs->tasklet->calls >= 1000000)
+					ret = 1;
 				resolve_sym_name(&trash, NULL, h2s->subs->tasklet->process);
 				chunk_appendf(&trash, ")");
 			}
 		}
 	}
-	return 0;
+	return ret;
 }
 
 /* Migrate the the connection to the current thread.