Function krb5_sys::krb5_kt_read_service_key

pub unsafe extern fn krb5_kt_read_service_key(context: krb5_context,
                                              keyprocarg: krb5_pointer,
                                              principal: krb5_principal,
                                              vno: krb5_kvno,
                                              enctype: krb5_enctype,
                                              key: *mut *mut krb5_keyblock)
                                              -> krb5_error_code