k5_build_conf_principals
ret = k5_build_conf_principals(context, id, principal, key, &cred);
ret = k5_build_conf_principals(context, id, principal, key, &mcred);
k5_build_conf_principals(krb5_context context, krb5_ccache id,
k5_build_conf_principals(context, ccache, server, key,