MEDIUM: applet: Set the conn-stream as appctx owner instead of the stream-int

Because appctx is now an endpoint of the conn-stream, there is no reason to
still have the stream-interface as appctx owner. Thus, the conn-stream is
now the appctx owner.
diff --git a/src/stick_table.c b/src/stick_table.c
index 331ee19..667123c 100644
--- a/src/stick_table.c
+++ b/src/stick_table.c
@@ -4391,7 +4391,7 @@
  */
 static int table_process_entry_per_key(struct appctx *appctx, char **args)
 {
-	struct stream_interface *si = appctx->owner;
+	struct stream_interface *si = cs_si(appctx->owner);
 	struct stktable *t = appctx->ctx.table.target;
 	struct stksess *ts;
 	uint32_t uint32_key;
@@ -4646,7 +4646,7 @@
  */
 static int cli_io_handler_table(struct appctx *appctx)
 {
-	struct stream_interface *si = appctx->owner;
+	struct stream_interface *si = cs_si(appctx->owner);
 	struct stream *s = si_strm(si);
 	struct ebmb_node *eb;
 	int skip_entry;