krb5_locate_kdc
retval = krb5_locate_kdc(context, &drealm, &addrlist, 0, SOCK_DGRAM, 0);
krb5_error_code krb5_locate_kdc
retval = krb5_locate_kdc(context, realm, &addrs, *use_master, socktype1, 0);
retval2 = krb5_locate_kdc(context, realm, &addrs2, *use_master,
retval = krb5_locate_kdc(context, realm, &addrs3, 1,