Add a state field for deletes.

git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@4963 d4fa192b-c00b-0410-8231-f00ffab90ce4

include/vsm.h

@@ -49,6 +49,7 @@ struct vsm_chunk {
 #define VSM_CHUNK_MAGIC		0x43907b6e	/* From /dev/random */
 	unsigned		magic;
 	unsigned		len;
+	unsigned		state;
 	char			class[8];
 	char			type[8];
 	char			ident[16];