akka/akka — pull request #1517 by patriknw (2013-05-31 08:01:27+00:00)
Title: tone down error logging in IO layer, see #3386

* Made defaultDecider available in SupervisorStrategy,
turned out that I didn't need it but I think it could be
good anyway, e.g.
`override def supervisorStrategy = OneForOneStrategy(
enableLogging = false)(SupervisorStrategy.defaultDecider)`
* Verified the following scenarios:
- client connection failure
- server bind failure
- kill client (peer closed)
- kill server (peer closed)

Some changes are based on guesses, so please correct if they are wrong.
The following errors/warnings are still logged:
- Error during selector management task
- aborting connection (buffer overrun)
- Invalid readyOps
- SSLEngine closed prematurely while sending
- SSLEngine closed prematurely while receiving
- Could not register incoming connection since selector capacity limit is reached