rem: NsCreateThread(thrPtr, stacksize, resultPtr);
add: NsCreateThread(thrPtr, stack, resultPtr);
context: Ns_ThreadCreate(Ns_ThreadProc *proc, void *arg, long stack,    	    	Ns_Thread *resultPtr){    Thread *thrPtr;    Ns_MasterLock();    /*     * Determine the stack size and impose a 16k minimum.     */    if (stack <= 0) {	stack = stacksize;    }    if (stack < STACK_MIN) {	stack = STACK_MIN;    }    /*     * Allocate a new thread structure and update values     * which are known for threads created here.     */    thrPtr = NewThread();    thrPtr->proc = proc;    thrPtr->arg = arg;    if (resultPtr == NULL) {    	thrPtr->flags = NS_THREAD_DETACHED;    }    strcpy(thrPtr->parent, Ns_ThreadGetName());    Ns_MasterUnlock();    NsCreateThread(thrPtr, stacksize, resultPtr);}