Added Warpgate

[Eugeny]

Warpgate is a smart SSH & HTTPS bastion host for Linux that can be used with any SSH client.

• Set it up in your DMZ, add user accounts and easily assign them to specific hosts and URLs within the network.
• Warpgate will record every SSH session for you to view (live) and replay later through a built-in admin web UI.
• Not a jump host - forwards your connections straight to the target instead.
• 2FA support
• Single binary with no dependencies.
• Written in 100% safe Rust.