Start a semantic patch archive

Move patches there which are not intended to be applied again, but which
we used once and want to keep for reference.

Also another coccinelle script which I found useful at one point.

tools/coccinelle/README.rst

@@ -10,4 +10,7 @@ Unless noted otherwise, all patches should work when invoked as::
 	       -I include/ -I bin/varnishd/ --dir . --in-place \
 	       --sp-file $COCCI
 
+The ``archive/`` directory contains patches which we used once and
+should not need again, but want to retain for reference.
+
 .. _coccinelle: http://coccinelle.lip6.fr/

tools/coccinelle/archive/vdp.cocci

+/*
+ * facilitate second half of phks vdp signature overhaul
+ */
+
+@@
+expression req;
+@@
+
+-VDP_Close(req)
++VDP_Close(req->vdc)
+
+@@
+expression req;
+@@
+
+-VDP_DeliverObj(req)
++VDP_DeliverObj(req->vdc, req->objcore)
+
+@@
+expression req, vdp, priv;
+@@
+
+-VDP_Push(req, vdp, priv)
++VDP_Push(req->vdc, req->ws, vdp, priv)
+
+@@
+expression req, vdp, priv;
+@@
+
+-VDP_Push(req, &vdp, priv)
++VDP_Push(req->vdc, req->ws, &vdp, priv)