extern int ip_recv(int, uschar *, int, int);
extern int ip_socket(int, int);
+extern int ip_tcpsocket(const uschar *, uschar **, int);
+extern int ip_unixsocket(const uschar *, uschar **);
+extern int ip_streamsocket(const uschar *, uschar **, int);
+
extern uschar *local_part_quote(uschar *);
extern int log_create(uschar *);
extern int log_create_as_exim(uschar *);
extern int stdin_ungetc(int);
extern uschar *string_append(uschar *, int *, int *, int, ...);
extern uschar *string_append_listele(uschar *, uschar, const uschar *);
+extern uschar *string_append_listele_n(uschar *, uschar, const uschar *, unsigned);
extern uschar *string_base62(unsigned long int);
extern uschar *string_cat(uschar *, int *, int *, const uschar *, int);
extern uschar *string_copy_dnsdomain(uschar *);