MINOR: http: Add debug messages when HTTP body analyzers are called

Only DPRINTF() for developers.
diff --git a/src/proto_http.c b/src/proto_http.c
index a7a0503..acfb26c 100644
--- a/src/proto_http.c
+++ b/src/proto_http.c
@@ -5593,6 +5593,13 @@
 			break;
 	}
 
+	DPRINTF(stderr,"[%u] %s: stream=%p old=%d,%d cur=%d,%d\n",
+		now_ms, __FUNCTION__,
+		s,
+		old_req_state, old_res_state,
+		txn->req.msg_state, txn->rsp.msg_state);
+
+
 	/* OK, both state machines agree on a compatible state.
 	 * There are a few cases we're interested in :
 	 *  - HTTP_MSG_TUNNEL on either means we have to disable both analysers
@@ -5679,6 +5686,15 @@
 	struct http_msg *msg = &s->txn->req;
 	int ret;
 
+	DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%d analysers=%02x\n",
+		now_ms, __FUNCTION__,
+		s,
+		req,
+		req->rex, req->wex,
+		req->flags,
+		req->buf->i,
+		req->analysers);
+
 	if (unlikely(msg->msg_state < HTTP_MSG_BODY))
 		return 0;
 
@@ -6865,6 +6881,15 @@
 	struct http_msg *msg = &s->txn->rsp;
 	int ret;
 
+	DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%d analysers=%02x\n",
+		now_ms, __FUNCTION__,
+		s,
+		res,
+		res->rex, res->wex,
+		res->flags,
+		res->buf->i,
+		res->analysers);
+
 	if (unlikely(msg->msg_state < HTTP_MSG_BODY))
 		return 0;