r22470: merge handling of broken connections from wins replication client code

r22470: merge handling of broken connections from wins replication client code
to the rpc client code

we need to always ask for read events on the socket otherwise we never
get the connection error reported.

shutdown the transport when a request timeout.

metze
(This used to be commit 3403c0cb15e08ec838b0bc834f941051fb94d124)