=act,clu,con,doc,per,rem,sam #15114 append missing parens at Actor.sender() invocations
=act #13942 Avoid allocations in LoggingReceived when disabled
Merge pull request #15416 from mkubala/missing-sender-parens-mkubala

=act,clu,con,doc,per,rem,sam #15114 append missing parens at sender invocations
+act #15383 add strict japi.Option.getOrElse to simplify working with options from Java
!per #15230 rename processorId => persistentId

* This is NOT binary compatible, we're in an *experimental* module.
* disabled binary compat checks for package akka.persistence
* Source compatibility is retained, but users should migrate do the new
  method name ASAP.
* Plugin APIs were migrated in a way that allows the old plugins to
  compile agains 2.3.4 without having to change anything. Hopefuly this
  will help authors migrate to 2.3.4 sooner. This is only source level compatible, not binary compatible.
* added deprecation warnings on all processorId methods and provided bridges where possible
* for users, the migration should be painless, they can still override
  the old method, and it'll work. But we encourage them to move to
  persistenceId; All delegation code will have to be removed afterwards ofc.

Conflicts:
	akka-persistence/src/main/scala/akka/persistence/Channel.scala
	akka-persistence/src/main/scala/akka/persistence/JournalProtocol.scala
	akka-persistence/src/main/scala/akka/persistence/Persistent.scala
	akka-persistence/src/main/scala/akka/persistence/PersistentChannel.scala
	akka-persistence/src/main/scala/akka/persistence/Processor.scala
	akka-persistence/src/main/scala/akka/persistence/Snapshot.scala
	akka-persistence/src/main/scala/akka/persistence/journal/AsyncWriteProxy.scala
	akka-persistence/src/main/scala/akka/persistence/journal/inmem/InmemJournal.scala
	akka-persistence/src/main/scala/akka/persistence/journal/leveldb/LeveldbKey.scala
	akka-persistence/src/main/scala/akka/persistence/snapshot/SnapshotStore.scala
	akka-persistence/src/test/scala/akka/persistence/serialization/SerializerSpec.scala
	project/AkkaBuild.scala
Merge pull request #15434 from ktoso/port-persistenceId-ktoso

!per #15230 rename processorId => persistentId (for validation)
=per #15230 deprecate Channel and PersistentChannel

Conflicts:
	akka-persistence/src/main/scala/akka/persistence/Channel.scala
	akka-persistence/src/main/scala/akka/persistence/PersistentChannel.scala
	akka-persistence/src/test/scala/akka/persistence/serialization/SerializerSpec.scala
Merge pull request #15435 from ktoso/port-deprecations-channel-ktoso

!per #15230 deprecate Channel and PersistentChannel (for Validation)
Merge pull request #15430 from spray/w/add-japi-Option-getOrElse

+act #15383 add strict japi.Option.getOrElse to simplify working with options from Java
+per,+str #15035 Reactive-stream producers for persistent messages written by akka-persistence processors

(cherry picked from commit 5dc62400e4f2f9d7afe5efe93fc8bef5b9d226c0)

Conflicts:
	akka-docs/rst/scala/code/docs/persistence/PersistenceDocSpec.scala
	project/AkkaBuild.scala
=per #15429 Rewrite persistence documentation and samples for 2.3.4 changes

(cherry picked from commit 02351e32f110a8c4a249f0f3f84bae5898d1a836)

Conflicts:
	akka-samples/akka-sample-persistence-java-lambda/tutorial/index.html
	akka-samples/akka-sample-persistence-java/tutorial/index.html
	akka-samples/akka-sample-persistence-scala/build.sbt
	akka-samples/akka-sample-persistence-scala/src/main/scala/sample/persistence/ConversationRecoveryExample.scala
	akka-samples/akka-sample-persistence-scala/src/main/scala/sample/persistence/PersistentActorExample.scala
	akka-samples/akka-sample-persistence-scala/src/main/scala/sample/persistence/ProcessorChannelExample.scala
	akka-samples/akka-sample-persistence-scala/src/main/scala/sample/persistence/ProcessorChannelRemoteExample.scala
	akka-samples/akka-sample-persistence-scala/src/main/scala/sample/persistence/SnapshotExample.scala
	akka-samples/akka-sample-persistence-scala/src/main/scala/sample/persistence/StreamExample.scala
	akka-samples/akka-sample-persistence-scala/tutorial/index.html
Merge pull request #15444 from akka/wip-15429-persistence-docs-master-patriknw

=per #15429 Rewrite persistence documentation and samples (for validation)
+per #15424 Added PersistentView, deprecated View

A PersistentView works the same way as View did previously, except:

* it requires an `peristenceId` (no default is provided)
* messages given to `receive` are NOT wrapped in Persistent()

akka-streams not touched, will update them afterwards on different branch

Also solves #15436 by making persistentId in PersistentView abstract.

(cherry picked from commit dcafaf788236fe6d018388dd55d5bf9650ded696)

Conflicts:
	akka-docs/rst/java/lambda-persistence.rst
	akka-docs/rst/java/persistence.rst
	akka-docs/rst/scala/persistence.rst
	akka-persistence/src/main/scala/akka/persistence/Persistent.scala
	akka-persistence/src/main/scala/akka/persistence/View.scala
Merge pull request #15450 from akka/wip-15424-master-patriknw

+per #15424 Added PersistentView, deprecated View (for validation)
!per #15436 make persistenceId abstract in NEW classes

(cherry picked from commit de3249f7f4b859c3caa232e579d9a3bae7406803)

Conflicts:
	akka-samples/akka-sample-persistence-scala/src/main/scala/sample/persistence/PersistentActorExample.scala
Merge pull request #15456 from akka/wip-15436-abstract-persistenceId-master-patriknw

!per #15436 make persistenceId abstract in NEW classes (for validation)
+per #15327 Add AtLeastOnceDelivery trait

* also remove final of around methods, and let deliver send when not recoveryRunning

(cherry picked from commit 312b0d107a179accaf135f64ed9c3b78f3e351d1)
Merge pull request #15461 from akka/wip-15327-reliable-redelivery-master-patriknw

+per #15327 Add AtLeastOnceDelivery trait (for validation)
=per #15459 Use full batching for persistAsync and defer

(cherry picked from commit 20ac844b4f3999d0261f1a08957c2c2a8367c672)

Conflicts:
	akka-bench-jmh/src/main/scala/akka/persistence/PersistenceActorDeferBenchmark.scala
=act #15361 Require non-abstract actor class (earlier)

* It was detected previously as well when trying to find constructor,
  but with a perhaps confusing error message

(cherry picked from commit 15e964b13e91962474c7907787c37121aae8fd4e)