MINOR: proto_tcp: add session in the action prototype

Some actions require the "struct session" while the "struct stream" is not
avalaible. This patch adds a pointer to the session.
diff --git a/include/types/proto_tcp.h b/include/types/proto_tcp.h
index 20b8a9f..88f6999 100644
--- a/include/types/proto_tcp.h
+++ b/include/types/proto_tcp.h
@@ -53,7 +53,7 @@
 	struct acl_cond *cond;
 	int action;
 	int (*action_ptr)(struct tcp_rule *rule, struct proxy *px,
-	                  struct stream *s);
+	                  struct session *sess, struct stream *s);
 	union {
 		struct track_ctr_prm trk_ctr;
 		struct capture_prm cap;