nsDNSRequest() : mLookup(nsnull), mSuspendCount(0), mStatus(NS_OK)
nsDNSRequest(nsDNSLookup *     lookup, nsIDNSListener *  userListener, nsISupports *     userContext) : mUserListener(userListener) , mUserContext(userContext) , mLookup(lookup) , mStatus(NS_OK)
    nsDNSRequest()        : mLookup(nsnull), mSuspendCount(0), mStatus(NS_OK)#ifdef DNS_TIMING        , mStartTime(PR_IntervalNow())#endif    { NS_INIT_REFCNT(); }