extern BOOL directory_make(const uschar *, const uschar *, int, BOOL);
#ifndef DISABLE_DKIM
-extern uschar *dkim_exim_query_dns_txt(uschar *);
+extern uschar *dkim_exim_query_dns_txt(const uschar *);
extern void dkim_exim_sign_init(void);
extern BOOL dkim_transport_write_message(transport_ctx *,
extern int ip_streamsocket(const uschar *, uschar **, int);
extern int ipv6_nmtoa(int *, uschar *);
-extern BOOL is_tainted_fn(const void *);
extern uschar *local_part_quote(uschar *);
extern int log_create(uschar *);