rng-tools: import from oldpackages

signed-off-by: Hannu Nyman <hannu.nyman@iki.fi>
rng-tools: upgrade to version 5

Edit init script to match current options.
Update copyright year.
Simplify download location.
Add myself as maintainer.

signed-off-by: Hannu Nyman <hannu.nyman@iki.fi>
Merge branch 'rng-tools' of https://github.com/hnyman/packages into rng-tools