Suggested-by: Daniel P. Berrange <berrange@redhat.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>

RSA requires the generation of random non-zero bytes (i.e. a sequence
of random numbers in the range [0x01,0xff]).  ANS X9.82 provides
various Approved methods for converting random bits into random
numbers.  The simplest such method is the Simple Discard Method.

Signed-off-by: Michael Brown <mcb30@ipxe.org>