Need chacha20-poly1305 AEAD support

[miximtor]

cryptopp supports both chacha20 and poly1305, but there is no document for chacha20-poly1305.

[noloader]

@miximtor,

With the recent additions of ChaChaTLS and Poly1305TLS you should have what you need, assuming you are interested in RFC 7905, ChaCha20-Poly1305 Cipher Suites for Transport Layer Security (TLS).

If that is not what you had in mind would you please state a standard?