krb5_gss_convert_static_mech_oid
gss_OID krb5_gss_convert_static_mech_oid(gss_OID oid);
ctx->mech_used = krb5_gss_convert_static_mech_oid(ctx->mech_used);
ctx->mech_used = krb5_gss_convert_static_mech_oid(ctx->mech_used);