clogd (cmirror): Reinit ckpt handle if openAIS goes away (bz518665)
    
    It is possible to pull the rug out from under the cluster log
    daemon by stopping the checkpoint service (openAIS) for which
    the log daemon has a handle.
    
    If the handle is later used, various errors are given.  It doesn't
    hurt to aquire a new handle though, so that is what is done.