* minor fixes
* remove now superfluous buffer from MultipartUnmarshaller
* remove unused TokenSourceActor
* remove FIXME: add tests, see #16437
* removed unused param remoteAddress (comment: TODO: remove after #16168 is cleared)
* convert FIXME to TODO (#18709)
* reenable tests in {Request|Response}RendererSpec due to fixed#15981
* remove logging workaround in StreamTestDefaultMailbox due to fixed#15947
* delegate backoff to separate/shared thread
* first level of spinning backoff in the source/sink, then hand
over to the shared TaskRunner thread that will spin/park backoff for
all sources/sinks
* improve the task queue
* Expire defaults when HTTP-date is not possible to parse (#20362) and 'If-Modified-Since' is more strict (excluding 0 - rfc 7232 3.3).
* Fixed reversed missing method MiMa problem (#20131) and 'expires' instead of 'expire' wording.
* HTTP-date should match '0' as DateTime.MinValue after all.
* Rewrite the pool gateway synchronization
Rewrite the pool gateway synchronization so that:
- The documented race condition in PoolInterfaceActor is gone. No
PoolInterfaceActor will receive new requests after the gateway
shutdown has been initiated (fix#20081).
- A gateway created using newHostConnectionPool will no longer
share its pool with others even when it has been shutdown
due to idle-timeout and recreated. Also, its original
materializer will be used to create all the successive
pools incarnations (fix#20080).
- Collapsing chains of gateways do no longer need to be created.
The gateways are now only an entrypoint to the pool master
actor, and this actor is in charge of keeping a cache of
currently active pools and recreate them from the information
given by the gateway when needed.
* Add copyright header
* Mark PoolMasterActor as INTERNAL API
* Larger outer timeout
* Define Props in PoolMasterActor object
* Comment INTERNAL API
* Remove unused import
Previously a failure during e.g. MailboxType.create() would make the
user guardian fail, tearing down the whole system as a result. The cause
is a deep bug in handling ActorCell creation that we cannot really fix
anymore due to resulting changes in semantics, hence this fix only
targets top-level actors (where the observable difference is an
unambiguous improvement).
fixes#15947
