BUG/MEDIUM: h1: Always try to receive more in h1_rcv_buf().

In h1_rcv_buf(), wake the h1c tasklet as long as we're not done reading the
request/response, and the h1c is not already subscribed for receiving. Now
that we no longer subscribe in h1_recv() if we managed to read data, we
rely on h1_rcv_buf() calling us again, but h1_process_input() may have
returned 0 if we only received part of the request, so we have to wake
the tasklet to be sure to get more data again.
diff --git a/src/mux_h1.c b/src/mux_h1.c
index b8beaef..86c6076 100644
--- a/src/mux_h1.c
+++ b/src/mux_h1.c
@@ -2426,7 +2426,7 @@
 		if (h1m->state != H1_MSG_TUNNEL || (h1m->state == H1_MSG_DATA && h1m->curr_len))
 			h1s->flags |= H1S_F_BUF_FLUSH;
 	}
-	else if (ret > 0 || (h1s->flags & H1S_F_SPLICED_DATA)) {
+	else {
 		h1s->flags &= ~H1S_F_SPLICED_DATA;
 		if (h1m->state != H1_MSG_DONE &&
 				!(h1c->wait_event.events & SUB_RETRY_RECV))