Clear All Request Headers on a REST Object

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Demonstrates Rest.ClearAllHeaders, which removes every request header previously added to the object.

let rest = chilkat::Rest::new();

// Connect to the REST server.  The 3rd argument enables TLS (use true for HTTPS on port 443),
// and the 4th enables automatic reconnection if the connection is dropped between requests.
let b_tls = true;
let b_auto_reconnect = true;
if rest.connect("example.com", 443, b_tls, b_auto_reconnect).is_err() {
    println!("{}", rest.last_error_text());
    return;
}

let _ = rest.add_header("Accept", "application/json");
let _ = rest.add_header("X-Custom-Header", "example-value");

// Remove all request headers previously added to this object, for example before reusing the same
// Rest object for a different request.
let _ = rest.clear_all_headers();

println!("All request headers cleared.");