This function allows to stop all fast sequences. This
might be handy in case of interactive plouf and may allow
to reset all "lost" sequences.
Examples
nisp_destroyall()// Example of what can go wrong...// We create a first set of random variables.srvx=setrandvar_new(3);// We overwrite the first set, with the same variable.srvx=setrandvar_new(3);// We have lost one setrandvar.// We could recover it withsetrandvar_tokens()// To destroy all the lost object, we can as well save// some time and destroy them all at once.nisp_destroyall()// There is no more setrandvar in use.setrandvar_tokens()// Must be []