- The  performance of Pod affinity/anti-affinity in the scheduler has been improved. ([#67788](https://github.com/kubernetes/kubernetes/pull/67788), [@ahmad-diaa](https://github.com/ahmad-diaa)) Courtesy of SIG Scalability, and SIG Scheduling

([#62695](https://github.com/kubernetes/kubernetes/pull/62695), [@CaoShuFeng](https://github.com/CaoShuFeng))

### IPv4/IPv6 run

IPv4/IPv6 dual-stack has been reimplemented for 1.20 to support dual-stack Services, based on user and community feedback. If your cluster has dual-stack enabled, you can create Services which can use IPv4, IPv6, or both, and you can change this setting for existing Services. Details are available in updated [IPv4/IPv6 dual-stack docs](https://docs.k8s.io/concepts/services-networking/dual-stack/), which cover the nuanced array of options.

pkg log/syslog (netbsd-arm64-cgo), const LOG_UUCP Priority
pkg log/syslog (netbsd-arm64-cgo), const LOG_WARNING = 4
pkg log/syslog (netbsd-arm64-cgo), const LOG_WARNING Priority
pkg log/syslog (netbsd-arm64-cgo), func Dial(string, string, Priority, string) (*Writer, error)
pkg log/syslog (netbsd-arm64-cgo), func NewLogger(Priority, int) (*log.Logger, error)
pkg log/syslog (netbsd-arm64-cgo), func New(Priority, string) (*Writer, error)

import static org.apache.maven.cling.invoker.mvnenc.EncryptInvoker.OK;

/**
 * The "diag" goal. It should always run, despite it overrides configured goal support.
 */
@Singleton
@Named("diag")
public class Diag extends ConfiguredGoalSupport {
    @Inject
    public Diag(MessageBuilderFactory messageBuilderFactory, SecDispatcher secDispatcher) {
        super(messageBuilderFactory, secDispatcher);
    }

pkg log/syslog (freebsd-arm64), const LOG_UUCP Priority
pkg log/syslog (freebsd-arm64), const LOG_WARNING = 4
pkg log/syslog (freebsd-arm64), const LOG_WARNING Priority
pkg log/syslog (freebsd-arm64), func Dial(string, string, Priority, string) (*Writer, error)
pkg log/syslog (freebsd-arm64), func New(Priority, string) (*Writer, error)
pkg log/syslog (freebsd-arm64), func NewLogger(Priority, int) (*log.Logger, error)

* etcd client add dial timeout. ([#61459](https://github.com/kubernetes/kubernetes/pull/61459), [@hzxuzhonghu](https://github.com/hzxuzhonghu))

pkg log/syslog (freebsd-riscv64), const LOG_UUCP Priority #53466
pkg log/syslog (freebsd-riscv64), const LOG_WARNING = 4 #53466
pkg log/syslog (freebsd-riscv64), const LOG_WARNING Priority #53466
pkg log/syslog (freebsd-riscv64), func Dial(string, string, Priority, string) (*Writer, error) #53466
pkg log/syslog (freebsd-riscv64), func New(Priority, string) (*Writer, error) #53466
pkg log/syslog (freebsd-riscv64), func NewLogger(Priority, int) (*log.Logger, error) #53466

- Updated the API documentation for Service.Spec.IPFamily to warn that its exact
  semantics will probably change before the dual-stack feature goes GA, and users
  should look at ClusterIP or Endpoints, not IPFamily, to figure out if an existing
  Service is IPv4, IPv6, or dual-stack. ([#91527](https://github.com/kubernetes/kubernetes/pull/91527), [@danwinship](https://github.com/danwinship)) [SIG Apps and Network]

pkg net/http, type CloseNotifier //deprecated
pkg net/http, type ProtocolError //deprecated
pkg net/http, type Request struct, Cancel //deprecated
pkg net/http, type Transport struct, Dial //deprecated
pkg net/http, type Transport struct, DialTLS //deprecated
pkg net/http, var ErrHeaderTooLong //deprecated
pkg net/http, var ErrMissingContentLength //deprecated
pkg net/http, var ErrShortBody //deprecated