v2.2.1

Release 2.2.1

Fixed
- The admin guide's "block account" action claimed the block covers both
  the next sign-in and sessions already open. Setting enabled = false stops
  the next sign-in; revoking stamps revokedAt and closes nothing until the
  integrator's session revocation listener is in place, as the note below
  the bullet says.

  The clause was introduced in 2.2.0 while rewriting that release's
  corrections from audit notes into instructions, reintroducing the defect
  the release existed to remove: a summary asserting an outcome that is
  only qualified further down the page.

Documentation only; no code or behaviour change.