[BUG] http: denied requests must not be counted as denied resps in listeners

Socket stats had a wrong counter. This harmless bugfix must be backported
to 1.4.
diff --git a/src/proto_http.c b/src/proto_http.c
index 920dca9..4645112 100644
--- a/src/proto_http.c
+++ b/src/proto_http.c
@@ -5248,7 +5248,7 @@
 
 				t->be->counters.denied_req++;
 				if (t->listener->counters)
-					t->listener->counters->denied_resp++;
+					t->listener->counters->denied_req++;
 
 				break;
 
@@ -5258,7 +5258,7 @@
 
 				t->be->counters.denied_req++;
 				if (t->listener->counters)
-					t->listener->counters->denied_resp++;
+					t->listener->counters->denied_req++;
 
 				break;
 
@@ -5366,7 +5366,7 @@
 
 			t->be->counters.denied_req++;
 			if (t->listener->counters)
-				t->listener->counters->denied_resp++;
+				t->listener->counters->denied_req++;
 
 			done = 1;
 			break;
@@ -5376,7 +5376,7 @@
 
 			t->be->counters.denied_req++;
 			if (t->listener->counters)
-				t->listener->counters->denied_resp++;
+				t->listener->counters->denied_req++;
 
 			done = 1;
 			break;