typedef struct Feed Feed;typedef struct Item Item; struct Feed {	char *link;	char *title;	char *descr;	char *editor;	char *image; /* just the url */	int ttl; /* minutes */ 	Item *items;	int nitems; 	void *aux;	void (*free)(Feed*);}; struct Item {	char *guid;	char *link;	char *title;	char *descr;	char *author;	char **encls;	int nencls;	Tm published;}; Feed *parserss(Biobuf *b); extern Tzone *tzone;