clogd: compensate for possible bug in OpenAIS - address bz432109
    
    clogd was trying to send messages on the CPG interface after it
    had done a cpg_leave.  This was causing cpg_mcast_join errors.
    
    Turns out that it is also /receiving/ CPG messages after a
    cpg_leave (which it was trying to process)...  I don't think
    CPG is suppose to do this.  In any case, it is now handled.