note 113221 deleted from function.mt-rand by cmb

Note Submitter: hofmann dot johannes at gmail dot com ---- /dev/urandom provides high entropy, but it is important to remember that it is created by collecting random os garbage from memory - if not enough of that garbage is created reading the file will just block the whole process until there is enough entropy to generate the requested random bytes. in debian-based setups, the rng-tools package can be used to manage entropy.