extern int ip_bind(int, int, uschar *, int);
extern int ip_connect(int, int, const uschar *, int, int, const blob *);
extern int ip_connectedsocket(int, const uschar *, int, int,
extern int ip_bind(int, int, uschar *, int);
extern int ip_connect(int, int, const uschar *, int, int, const blob *);
extern int ip_connectedsocket(int, const uschar *, int, int,