aggregate received data as long as there's data in kernel buffers or 'received-message-size-limit' is reached, see #2886
fix: skip selector when read is split up just because of ReceivedMessageSizeLimit
use config.getBytes where appropriate
Merge pull request #1059 from spray/wip-IO-ReduceReceivedMsgs

aggregate received data as long as there's data in kernel buffers or 're...