construct_url(buf, r->url, r->cn->s);
construct_url(buf, r->url, r->vs);
static int makedir(struct request *r){	static char buf[PATHLEN];	char *e;	construct_url(buf, r->url, r->cn->s);	e = buf+strlen(buf);	*e++ = '/';	*e = '\0';	r->location = buf;	return 302;}