Minor: onAfterRequest() callback always called also in case of exception
Issue #1404.  Issue with massive growing of WAL during document update was fixed.
Server: improved message on error while sending records to the client
Merge branch 'master' of https://github.com/nuvolabase/orientdb
Fixed problem on remote protocol: in case of timeout the socket is closed to avoid dirty data
Fixed problem with remote protocol when the result set contains NULL links
Binary protocol: used INFO level for protocol tracing.