tolower_u8
if ((lower_name = tolower_u8(req->id1name)) == NULL)
if ((lower_winname = tolower_u8(winname)) == NULL)
if ((lower_name = tolower_u8(name)) == NULL)
if ((lower_winname = tolower_u8(rule->winname)) == NULL)
extern char *tolower_u8(const char *);