r10766: - make it possible to mark a wrepl_request as send only,

r10766: - make it possible to mark a wrepl_request as send only,
  used for WREPL_REPL_INFORM* messsages
- make it possible to close the connection after a request was send
  used for WREPL_ASSOCIATION_STOP
- fix the torture test that tests the assoc context handling
  between connections, you can issue a request and get the reply
  on another connection, I think we should not implement that in our server
  code, as I think it's a security hole, you can cause a windows server
  to send the replies to someone another client, that doesn't wait for data,
  and as there're no massage_id in the protocol the client would be confused
  by a replies that doesn't belong to a query

metze