* }
     * The {@code Principal} object returned will never be {@code null}
     * however the username can be {@code null} indication anonymous
     * credentials were used (e.g. some IPC$ services).
     */

    /**
     * Returns the principal used for authentication
     *
     * @return the authentication principal
     */
    public Principal getPrincipal() {
        return auth;

- Promote Relaxed validation for Services names to beta (enabled by default)
  
  Promote `RelaxedServiceNameValidation` feature to beta (enabled by default)
  The  names of new Services names are validation with `NameIsDNSLabel()`,

- **Network**
  - [stable] Services can reference another service by DNS name, rather than being hosted in pods ([kubernetes/features#33](https://github.com/kubernetes/enhancements/issues/33))

servep2p.com
servepics.com
servequake.com
server-on.net
servername.us
servers.run
servesarcasm.com
service.gov.scot
service.gov.uk
service.one
servicebus.windows.net
services
services.aero
setagaya.tokyo.jp
seto.aichi.jp
setouchi.okayama.jp
settsu.osaka.jp
sevastopol.ua
seven
sew
sex
sex.hu
sex.pl
sexy
sf.no
sfr
sg

* rkt: Force `rkt fetch` to fetch from remote to conform the image pull policy. ([#31378](https://github.com/kubernetes/kubernetes/pull/31378), [@yifan-gu](https://github.com/yifan-gu))
* Allow services which use same port, different protocol to use the same nodePort for both ([#30253](https://github.com/kubernetes/kubernetes/pull/30253), [@AdoHe](https://github.com/AdoHe))

servep2p.com
servepics.com
servequake.com
server-on.net
servername.us
servers.run
servesarcasm.com
service.gov.scot
service.gov.uk
service.one
servicebus.windows.net
services
services.aero
setagaya.tokyo.jp
seto.aichi.jp
setouchi.okayama.jp
settsu.osaka.jp
sevastopol.ua
seven
sew
sex
sex.hu
sex.pl
sexy
sf.no
sfr
sg

     * resource refers to a workgroup in a <code>smb://workgroup/</code> URL,
     * <li>all browseable shares of a server including printers, IPC
     * services, or disk volumes if this resource is a server URL in the form
     * <code>smb://server/</code>,
     * <li>or <code>null</code> if the resource cannot be resolved.
     * </ul>
     *