rem: CreateTclThread(itPtr, script, 1, thrPtr);
add: CreateTclThread(itPtr, script, (thrPtr == NULL), thrPtr);
context: Ns_TclThread(Tcl_Interp *interp, char *script, Ns_Thread *thrPtr){    NsInterp *itPtr = NsGetInterp(interp);    CreateTclThread(itPtr, script, 1, thrPtr);    return NS_OK;}