extern int auth_get_data(uschar **, uschar *, int);
extern int auth_get_no64_data(uschar **, uschar *);
+extern void auth_show_supported(FILE *);
extern uschar *auth_xtextencode(uschar *, int);
extern int auth_xtextdecode(uschar *, uschar **);
extern uschar * fn_hdrs_added(void);
-extern void gstring_grow(gstring *, int, int);
-
extern void header_add(int, const char *, ...);
extern int header_checkname(header_line *, BOOL);
extern BOOL header_match(uschar *, BOOL, BOOL, string_item *, int, ...);
extern int malware(const uschar *, int);
extern int malware_in_file(uschar *);
extern void malware_init(void);
+extern void malware_show_supported(FILE *);
#endif
extern int match_address_list(const uschar *, BOOL, BOOL, const uschar **,
unsigned int *, int, int, const uschar **);
extern BOOL route_find_expanded_user(uschar *, uschar *, uschar *,
struct passwd **, uid_t *, uschar **);
extern void route_init(void);
+extern void route_show_supported(FILE *);
extern void route_tidyup(void);
extern uschar *search_find(void *, uschar *, uschar *, int, const uschar *, int,
extern uschar *string_open_failed(int, const char *, ...) PRINTF_FUNCTION(2,3);
extern const uschar *string_printing2(const uschar *, BOOL);
extern uschar *string_split_message(uschar *);
+extern uschar *string_timediff(struct timeval *);
extern uschar *string_timesince(struct timeval *);
extern uschar *string_unprinting(uschar *);
#ifdef SUPPORT_I18N
extern BOOL transport_write_string(int, const char *, ...);
extern BOOL transport_headers_send(transport_ctx *,
BOOL (*)(transport_ctx *, uschar *, int));
+extern void transport_show_supported(FILE *);
extern BOOL transport_write_message(transport_ctx *, int);
extern void tree_add_duplicate(uschar *, address_item *);
extern void tree_add_nonrecipient(uschar *);