[MEDIUM] merge inspect_exp and txn->exp into request buffer

Since we may have several analysers on a buffer, it's more
convenient to have the analyser timeout attached to the
buffer itself.
diff --git a/src/client.c b/src/client.c
index 3e1272e..a6c8ebf 100644
--- a/src/client.c
+++ b/src/client.c
@@ -353,10 +353,10 @@
 
 		s->req->rex = TICK_ETERNITY;
 		s->req->wex = TICK_ETERNITY;
+		s->req->analyse_exp = TICK_ETERNITY;
 		s->rep->rex = TICK_ETERNITY;
 		s->rep->wex = TICK_ETERNITY;
-		s->txn.exp = TICK_ETERNITY;
-		s->inspect_exp = TICK_ETERNITY;
+		s->rep->analyse_exp = TICK_ETERNITY;
 		t->expire = TICK_ETERNITY;
 
 		fd_insert(cfd);