[PATCH] Add tag header/parser to library

This adds preliminary support for tags in the library. It doesn't even
store the signature, however, let alone provide any way of checking it.

Signed-Off-By: Daniel Barkalow <barkalow@iabervon.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

tag.h

@@ -0,0 +1,15 @@
+#ifndef TAG_H
+#define TAG_H
+
+#include "object.h"
+
+extern const char *tag_type;
+
+struct tag {
+	struct object object;
+	struct object *tagged;
+	char *tag;
+	char *signature; /* not actually implemented */
+};
+
+#endif /* TAG_H */