Docs central, with 'Email Self-Defence'

[Robert J. Hansen]

> Is there really that much flux in the crypto world? It seems rather steady to
> me. Things which seem stable stay stable, things which seem suspect, stay
> suspect. Generally.

Definitely.  Keeping up-to-date with the most recent versions, with new
features, with security advisories, etc.

Imagine if someone were to have written comprehensive and detailed
documentation for GnuPG 2.0, and how much of it would need to be
rewritten for the introduction of ECC into GnuPG 2.1.