[Windows] Web Client is unreasonably slow

Reproduce snippet:
```rust
#[actix_web::main]
async fn main() -> std::io::Result<()> {
let sys_time = std::time::SystemTime::now();
let start_time = sys_time.elapsed().unwrap();

let client = actix_web::client::Client::builder()
.connector(actix_web::client::Connector::new()
.timeout(Duration::from_secs(35))
.finish())
.timeout(Duration::from_secs(35))
.finish();

let response = client.get("https://google.com")
.send()
.await
.unwrap()
.body()
.await
.unwrap();
let end_time = sys_time.elapsed().unwrap();
let secs = end_time - start_time;
println!("{}", secs.as_secs());
return Ok(());
}
```

This code prints "20" on Windows, i.e. get request to Google takes 20 seconds.

Same code on Linux (WSL2) takes 0 seconds.

I don't have any clues what might be wrong, but perhaps it's related to DNS resolution?

`Cargo.toml`:
```toml
// ...

[dependencies]
actix-web = { version = "3", features = ["rustls"] }
```

Start with the Rust client code in the reproduction and the actix-web version 3 dependency in Cargo.toml. Run the snippet on Windows and Linux/WSL2, then investigate the request path and DNS-resolution hypothesis. Done means the same Google request no longer takes about 20 seconds on Windows and the behavior is covered by an appropriate regression test.

索引モデルが issue の本文から書いたものです。