<sub-class-of type="application/x-matroska"/>
    <glob pattern="*.webm" />
  </mime-type>

  <mime-type type="x-conference/x-cooltalk">
    <_comment>Cooltalk Audio</_comment>
    <glob pattern="*.ice"/>
  </mime-type>

  <mime-type type="application/x-fictionbook+xml">
      <_comment>FictionBook document</_comment>
      <sub-class-of type="application/xml"/>

ubernetes.io/pod` and `container.seccomp.security.alpha.kubernetes.io/...` annotations are now deprecated, and will be removed in Kubernetes v1.22.0. Right now, an automatic version skew handling will convert the new field into the annotations and vice versa. This means there is no action required for converting existing workloads in a cluster.

You can find more information about how to restrict container system calls with seccomp in the new [documentation page on Kubernetes.io][seccomp-docs]...