extern uschar *string_open_failed(int, const char *, ...) PRINTF_FUNCTION(2,3);
extern uschar *string_printing2(uschar *, BOOL);
extern uschar *string_split_message(uschar *);
+extern uschar *string_unprinting(uschar *);
extern BOOL string_vformat(uschar *, int, const char *, va_list);
extern int strcmpic(const uschar *, const uschar *);
extern int strncmpic(const uschar *, const uschar *, int);