Changes:

* 302 Found
* 307 Temporary Redirect

  Do not apply the default ttl, only set a ttl if Cache-Control or Expires are
present.
  Responses with these status codes are not cacheable by default

* 414 Request-URI Too Large

  Cacheable with "heuristic expiration"

https://www.varnish-cache.org/patchwork/patch/251/