[Nel] NeL whitepaper

[Jonathan Ellis]

I dug this up in my search for documentation:
http://web.archive.org/web/20010126170000/http://www.nevrax.org/docs/doxygen/nel/general.html

This sort of thing could be very useful if updated...  Or should the
fact that the page was taken down indicate that updating it isn't
planned?

-Jonathan