Awesome

This is a fork of VTUN, with the following changes:

• OpenSSL was replaced with libsodium. This requires libsodium >= 1.0.6.

• Unauthenticated encryption schemes were replaced with hardware-accelerated AES256-GCM.

• The static, shared key was replaced by an ephemeral keys exchange with Curve25519. The PSK is now only used to sign ephemeral public keys and parameters.

• Protection against replay attacks was added.

• Passwords are not kept in memory, guarded memory allocations are used for secrets.