[MAJOR] invalid header offset broke cookies and authentication

Since the request is no longer part of the headers, cookies and
authentication did not work anymore. Obvious fix is to add the
request offset to the start pointer.
diff --git a/src/proto_http.c b/src/proto_http.c
index fe59170..94d354c 100644
--- a/src/proto_http.c
+++ b/src/proto_http.c
@@ -3933,10 +3933,10 @@
 	/* Iterate through the headers.
 	 * we start with the start line.
 	 */
-	old_idx = cur_idx = 0;
-	cur_next = req->data + hreq->req.sor;
+	old_idx = 0;
+	cur_next = req->data + hreq->req.sor + hdr_idx_first_pos(&hreq->hdr_idx);
 
-	while ((cur_idx = hreq->hdr_idx.v[cur_idx].next)) {
+	while ((cur_idx = hreq->hdr_idx.v[old_idx].next)) {
 		struct hdr_idx_elem *cur_hdr;
 
 		cur_hdr  = &hreq->hdr_idx.v[cur_idx];
@@ -4380,7 +4380,7 @@
 
 		/* FIXME: this should move to an earlier place */
 		cur_idx = 0;
-		h = t->req->data + hreq->req.sor;
+		h = t->req->data + hreq->req.sor + hdr_idx_first_pos(&hreq->hdr_idx);
 		while ((cur_idx = hreq->hdr_idx.v[cur_idx].next)) {
 			int len = hreq->hdr_idx.v[cur_idx].len;
 			if (len > 14 &&