of form `"<user>:<password>@tcp(<host>:<port>)/<database>"`

MinIO supports persistent event store. The persistent store will backup events if MySQL connection goes offline and then replays the stored events when the broken connection comes back up. The event store can be configured by setting a directory path in `queue_dir` field, and the maximum number of events, which can be stored in a `queue_dir`, in `queue_limit` field. For example, `queue_dir` can be set to `/home/events` and `queue_limit`...

  // More info: https://kubernetes.io/docs/concepts/overview/working-with-objects/labels
  // +optional
  map<string, string> labels = 11;

  // Annotations is an unstructured key value map stored with a resource that may be
  // set by external tools to store and retrieve arbitrary metadata. They are not
  // queryable and should be preserved when modifying objects.

 *  Fix: Avoid using invalid HTTPS sessions. This prevents OkHttp from crashing
    with the error, `Unexpected TLS version: NONE`.
 *  Fix: Don't corrupt the response cache when a 304 (Not Modified) response
    overrides the stored "Content-Encoding" header.
 *  Fix: Gracefully shut down the HTTP/2 connection before it exhausts the
    namespace of stream IDs (~536 million streams).
 *  Fix: Never pass a null `Route` to `Authenticator`. There was a bug where

 *  * http://host
 *
 * Both the unnecessary port specification (`:80`) and the absent trailing slash (`/`) cause URI to
 * bucket the two URLs separately. This harms URI's usefulness in collections. Any application that
 * stores information-per-URL will need to either canonicalize manually, or suffer unnecessary
 * redundancy for such URLs.
 *
 * Because they don't attempt canonical form, these classes are surprisingly difficult to use

    // Once the journal has a failure, subsequent writes aren't permitted.
    filesystem.setFaultyWrite(journalFile, false)
    assertThat(cache.edit("d")).isNull()

    // Confirm that the fault didn't corrupt entries stored before the fault was introduced.
    cache.close()
    cache =
      DiskLruCache(filesystem, cacheDir, appVersion, 2, Int.MAX_VALUE.toLong(), taskRunner).also {
        toClose.add(it)
      }

     *       fun foo() {
     *         // Distance to scopes for classes from <element> in the order from the closest:
     *         //   scope2 -> scope3 -> scope1
     *         <element>
     *       }
     *       companion object { // scope3  ClassId = Other.Inner.Companion
     *       }
     *     }
     *   }
     *
     * This function determines the distance based on [ClassId].
     */

* Use protobufs by default to communicate with apiserver (still store JSONs in etcd) ([#25738](https://github.com/kubernetes/kubernetes/pull/25738), [@wojtek-t](https://github.com/wojtek-t))