extern int auth_call_pam(const uschar *, uschar **);
extern int auth_call_pwcheck(uschar *, uschar **);
extern int auth_call_radius(const uschar *, uschar **);
extern int auth_call_pam(const uschar *, uschar **);
extern int auth_call_pwcheck(uschar *, uschar **);
extern int auth_call_radius(const uschar *, uschar **);