#include <krb5/krb5.h>void
krb5_appdefault_boolean(krb5_context context, const char *appname, krb5_realm realm, const char *option, krb5_boolean def_val, krb5_boolean *ret_val);
void
krb5_appdefault_string(krb5_context context, const char *appname, krb5_realm realm, const char *option, const char *def_val, char **ret_val);
void
krb5_appdefault_time(krb5_context context, const char *appname, krb5_realm realm, const char *option, time_t def_val, time_t *ret_val);