* Strategic Merge Patch

    * Reference docs now display the patch type and patch merge key used by `kubectl apply` to merge and identify unique elements in arrays.

      * `kubectl edit` and `kubectl apply` will keep the ordering of elements in merged lists ([#45980](https://github.com/kubernetes/kubernetes/pull/45980), [@mengqiy](https://github.com/mengqiy))

      HashMap<K, V> newHashMapWithExpectedSize(int expectedSize) {
    return new HashMap<>(capacity(expectedSize));
  }

  /**
   * Returns a capacity that is sufficient to keep the map from being resized as long as it grows no
   * larger than expectedSize and the load factor is ≥ its default (0.75).
   */
  static int capacity(int expectedSize) {
    if (expectedSize < 3) {

### Other (Cleanup or Flake)

- Kube-apiserver: sets an upper-bound on the lifetime of idle keep-alive connections and time to read the headers of incoming requests ([#103958](https://github.com/kubernetes/kubernetes/pull/103958), [@liggitt](https://github.com/liggitt)) [SIG API Machinery and Node]

## Dependencies

      HashMap<K, V> newHashMapWithExpectedSize(int expectedSize) {
    return new HashMap<>(capacity(expectedSize));
  }

  /**
   * Returns a capacity that is sufficient to keep the map from being resized as long as it grows no
   * larger than expectedSize and the load factor is ≥ its default (0.75).
   */
  static int capacity(int expectedSize) {
    if (expectedSize < 3) {

- Graduated _forensic container checkpointing_ [KEP #2008](https://kep.k8s.io/2008) from Alpha to Beta. ([#123215](https://github.com/kubernetes/kubernetes/pull/123215), [@adrianreber](https://github.com/adrianreber)) [SIG Node and Testing]

operands must have the same announced length. // //go:norace func (x *Nat) maybeSubtractModulus(always choice, m *Modulus) { t := NewNat().set(x) underflow := t.sub(m.nat) // We keep the result if x - m didn't underflow (meaning x >= m) // or if always was set. keep := not(choice(underflow)) | choice(always) x.assign(keep, t) } // Sub computes x = x - y mod m. // // The length of both operands must be the same as the modulus. Both operands // must already be reduced modulo m. // //go:norace func (x...

### Misc

operands must have the same announced length. // //go:norace func (x *Nat) maybeSubtractModulus(always choice, m *Modulus) { t := NewNat().set(x) underflow := t.sub(m.nat) // We keep the result if x - m didn't underflow (meaning x >= m) // or if always was set. keep := not(choice(underflow)) | choice(always) x.assign(keep, t) } // Sub computes x = x - y mod m. // // The length of both operands must be the same as the modulus. Both operands // must already be reduced modulo m. // //go:norace func (x...

### Other (Cleanup or Flake)

- Kube-apiserver: sets an upper-bound on the lifetime of idle keep-alive connections and time to read the headers of incoming requests ([#103958](https://github.com/kubernetes/kubernetes/pull/103958), [@liggitt](https://github.com/liggitt)) [SIG API Machinery and Node]

## Dependencies

## Urgent Upgrade Notes

### (No, really, you MUST do this before you upgrade)

Before upgrading to Kubernetes 1.13, you must keep the following in mind:

- kube-apiserver