v0.10.0

Added

• conditional-requests-api gains optional-tier conditional-read cases (spec
  "Caching"): a GET or HEAD with an If-None-Match matching the current ETag
  is 304 with the ETag and no body while a stale validator is 200, a W/
  validator, a list, and * all match (weak comparison), another controller's
  conditional GET is the 404 mask rather than a 304, and a POST response carries
  Cache-Control: no-store.