* +str #18793 StageLogging that allows logger access in stages
Also, non ActorMaterializers can opt-into providing a logger here.
* +str #18794 add javadsl for StageLogging
* fix missing test method on compile only class
* they can't be stopped immediately because we want to send
some final message and we reply to inbound messages with `Quarantined`
* and improve logging
* StreamSupervisor as system actor so that it is
stopped after ordinary actors
* when transport is shutdown send flush message to all
outbound associations (over control stream) and wait for ack
or timeout
* InboundQuarantineCheck stage sends back Quarantined control
message if sender system is quarantined
* Ported old RemoteRestartedQuarantinedSpec
* outbound quarantine check and piercing with ActorSelectionMessage
* port of old RemoteQuarantinePiercingSpec and PiercingShouldKeepQuarantineSpec
* quarantine if sys msg buffer overflow
* handle UID incarnations, shared association state that can be swapped
for new handshakes
* detect that message comes from unknown origin and then initiate new
handshake (handled by InboundHandshake stage)
* simplify the OutboundHandshake stage
* doesn't have to listen for HandshakeRsp replies, it can just listen
to when the uniqueRemoteAddress future is completed, InboundHandshake
stage completes the handshake when it receives HandshakeRsp
* send the HandshakeReq via the control message ingress, instead of
pushing it downstreams, than also means that HandshakeReq is only sent
on the control stream, which is good
* materialization race condition
