AUTH_KRB5
if (auth == AUTH_KRB5) {
auth = AUTH_KRB5;
if(auth_method == AUTH_KRB5) {
if(auth_method == AUTH_KRB5) {
if(auth_method == AUTH_KRB5 && protocol_version == 2)
auth_method = AUTH_KRB5;
if(auth_method == AUTH_KRB5 && protocol_version == 2)
auth_method = AUTH_KRB5;