Certificate}'s
        C{peerFromTransport} and C{hostFromTransport} methods depend on being
        able to get an L{OpenSSL.SSL.Connection} object in order to work
        properly.  Implementing L{ISystemHandle.getHandle} like this is the
        easiest way for those APIs to be made to work.  If they are changed,
        then it may make sense to get rid of this implementation of
        L{ISystemHandle} and return the underlying socket instead.
        TN)
r*