Zulip Server 4.11

• CVE-2022-24751: Zulip Server 4.0 and above were susceptible to a
  race condition during user deactivation, where a simultaneous access
  by the user being deactivated may, in rare cases, allow continued
  access by the deactivated user. This access could theoretically
  continue until one of the following events happens:
  • The session expires from memcached; this defaults to two weeks, and
    is controlled by SESSION_COOKIE_AGE in /etc/zulip/settings.py
  • The session cache is evicted from memcached by other cached data.
  • The server is upgraded, which clears the cache.
• Updated translations.