add: FreeConn(drvPtr, sockPtr->connPtr);
context: SockClose(Driver *drvPtr, Sock *sockPtr){    /*     * Free the Conn if the Sock is still responsible for it.     */         if (sockPtr->connPtr != NULL) {        /*         * Calling FreeConn() here seems to trash the server.         */        // FreeConn(drvPtr, sockPtr->connPtr);	sockPtr->connPtr = NULL;    }    ns_sockclose(sockPtr->sock);    sockPtr->sock = INVALID_SOCKET;    sockPtr->nextPtr = drvPtr->freeSockPtr;    drvPtr->freeSockPtr = sockPtr;    --drvPtr->nactive;}