forked from I2P_Developers/i2p.i2p

- ChaCha20: Add ivOffset param - ChaCha20/Poly1305: Add adOffset/adLength params - Noise: Add XK-SSU2 initializer - Noise: Add notes about handshake offsets
- ChaCha20: Add ivOffset param - ChaCha20/Poly1305: Add adOffset/adLength params - Noise: Add XK-SSU2 initializer - Noise: Add notes about handshake offsets