config: pgsql-blocker sends request and expects response
config: pgsql-blocker sends request and expects response

The SocketReadyBlocker is checking whether the remote server is
really a PostgreSQL server by sending the start-up sequence.

Signed-off-by: Jan Viktorin <3eab6ac54c005c4408f608556a6663b7f2abede7@fit.vutbr.cz>

BeeeOn/server,BeeeOn/server,BeeeOn/server,BeeeOn/server