 security policies including
<a href=/v1.9/docs/tasks/security/authentication/authn-policy/#auto-mutual-tls>Auto mTLS</a>,
<a href=https://archive.istio.io/1.4/docs/reference/config/security/istio.authentication.v1alpha1/><code>AuthenticationPolicy</code></a>
(<code>PeerAuthentication</code> and <code>RequestAuthentication</code>) and authorization are now in
Beta. SDS is now stable. Authorization now supports Deny semantics to enforce
mandatory controls that cannot be overridden. We have combined the Node 