typedef struct Url Url;typedef struct Buq Buq;typedef struct Buf Buf;typedef struct Key Key; typedef struct {	char	*s1;	char	*s2;} Str2; /* 9p */typedef struct Req Req; struct Url{	char	*scheme;	char	*user;	char	*pass;	char	*host;	char	*port;	char	*path;	char	*query;	char	*fragment;}; struct Buf{	Buf	*next;	uchar	*rp;	uchar	*ep;	Req	*wreq;	uchar	end[];}; struct Key{	Key	*next;	char	*val;	char	key[];}; struct Buq{	Ref;	QLock; 	Url	*url;	Key	*hdr;	char	*error; 	int	closed;	int	limit;	int	size;	int	nwq; 	/* write buffers */	Buf	*bh;	Buf	**bt; 	/* read requests */	Req	*rh;	Req	**rt; 	Rendez	rz;}; int	debug;Url	*proxy;int	timeout;char	*whitespace; enum {	Domlen = 256,};