New HTTP and UDP testking clients

[josecelano]

I have added two new simple tracker clients (for testing purposes) that you can use to make announce requests. For example, using the demo tracker:

HTTP tracker client

$ cargo run --bin http_tracker_client https://tracker.torrust-demo.com 000762bd6da974bb0385bcf59b0cf48b089c6333 | jq
    Finished dev [optimized + debuginfo] target(s) in 0.07s
     Running `target/debug/http_tracker_client 'https://tracker.torrust-demo.com' 000762bd6da974bb0385bcf59b0cf48b089c6333`
{
  "complete": 2,
  "incomplete": 0,
  "interval": 300,
  "min interval": 300,
  "peers": [
    {
      "ip": "XX.YY.ZZ.254",
      "peer id": [
        45,
        66,
        76,
        50,
        52,
        54,
        51,
        54,
        51,
        45,
        126,
        45,
        54,
        66,
        110,
        113,
        81,
        41,
        86,
        83
      ],
      "port": 56627
    }
  ]
}

UDP Tracker client

$ cargo run --bin udp_tracker_client  144.126.245.19:6969              000762bd6da974bb0385bcf59b0cf48b089c6333
   Compiling torrust-tracker v3.0.0-alpha.12-develop (/home/josecelano/Documents/git/committer/me/github/torrust/torrust-tracker)
    Finished dev [optimized + debuginfo] target(s) in 2.48s
     Running `target/debug/udp_tracker_client '144.126.245.19:6969' 000762bd6da974bb0385bcf59b0cf48b089c6333`
AnnounceIpv4(
    AnnounceResponse {
        transaction_id: TransactionId(
            -888840697,
        ),
        announce_interval: AnnounceInterval(
            300,
        ),
        leechers: NumberOfPeers(
            0,
        ),
        seeders: NumberOfPeers(
            2,
        ),
        peers: [
            ResponsePeer {
                ip_address: XX.YY.ZZ.254,
                port: Port(
                    56627,
                ),
            },
        ],
    },
)

The output for the UDP client is not JSON because the aquatic UDP protocol crate does not derive the Serialize trait.

In the future, it could be used for smoke testing after deploying a new version to the demo env.