Fix typo in docs
 #3437 - Adding rst documentation for the MPSC mailbox
! remoting:  EndpointWriter uses mailbox requirements instead of dispatchers #3480
(cherry picked from commit 634d60d)
Merge pull request #1597 from drewhk/wip-3480-backport-drewhk

! remoting:  EndpointWriter uses mailbox requirements #3480 (backport)
Error level remoting events are logged by default #3475
Logging of transient errors in remoting attempt 2.
Keep the order of buffered messages in Camel producer, see #3477

* fix bug in java sample
* doc corrections
DOC: Props.empty.withRouter, see #3464
DOC: Clarify the two types of cluster aware routers, see #3447
DOC: Strange link names, see #3259
DOC: correct wrong advice in 'Routers and Supervision', see #3484

* and clarify default restart behavior more
= doc: Added warning about closing over in scheduled tasks #3263
DOC: clarify empty CurrentClusterState for early subscribers, see #3470
DOC: Describe cluster dispatcher, see #2816
Do not publish aggregator projects, see #3481
=doc: Document code block style difference from style guide #3106
=doc: Document that EventBus do not preserve sender #2918
Update ActorInitializationException message to be symmetric Java/Scala, see #3275
Make Throttler usable from Java, see #3223
DOC: how to conf dispatcher of camel producer, see #3048