tap_int

• clearer CLI arguments
• the ability to add multiple IP addresses easily
• full IPv6 support
• clearer error messages
• support for daemonizing
• support for resolving hostnames
• optional support for encryption (using the XChaCha20Poly1305 algorithm) using the orion crate.

Usage:
 --iface_name <str>      Name of the interface
 --laddr <socket addr>   Listen address
 --raddr <socket addr>   Remote address
 --addr <ip addr>        Address to add to the interface (in CIDR format)
 --daemonize             Run as a daemon

 --addr can be used multiple times to add multiple addresses to the interface
 ```

### Features
- `crypto`: encryption using XChaCha20Poly1305. The key must be 32 bits long, and should be the same on both sides of the tunnel.