lpcmanager

Port to python3: used 2to3 ver 3.10 + some manual fixes until IDE shows up. Pairs with new windows installer, lpcdistro 25eb179471d7.
pthread_mutex_lock(&UART_WakeCondLock);
UART_task_active = 0;
pthread_cond_signal(&UART_WakeCond);
pthread_mutex_unlock(&UART_WakeCondLock);
pthread_join(UART_task, NULL);
closeserial(UART_fd);