[MINOR] pre-set analyser flags on the listener at registration time

In order to achieve more generic accept() code, we can set the request
analysers at the listener registration time. It's better than doing it
during accept(), and allows more code reuse.
diff --git a/src/client.c b/src/client.c
index bf7f55c..65ffdaa 100644
--- a/src/client.c
+++ b/src/client.c
@@ -153,7 +153,7 @@
 			setsockopt(cfd, SOL_SOCKET, SO_LINGER, (struct linger *) &nolinger, sizeof(struct linger));
 
 		task_init(t);
-		t->process = process_session;
+		t->process = l->handler;
 		t->context = s;
 
 		s->task = t;
@@ -366,11 +366,8 @@
 		if (p->mode == PR_MODE_HTTP) /* reserve some space for header rewriting */
 			s->req->rlim -= MAXREWRITE;
 
-		if (s->fe->tcp_req.inspect_delay)
-			s->req->analysers |= AN_REQ_INSPECT;
-
-		if (p->mode == PR_MODE_HTTP)
-			s->req->analysers |= AN_REQ_HTTP_HDR;
+		/* activate default analysers enabled for this listener */
+		s->req->analysers = l->analysers;
 
 		if (!s->req->analysers)
 			buffer_write_ena(s->req);  /* don't wait to establish connection */