Default timeouts and size limits for Deno.serve

[lucacasonato]

Deno.serve should have default limits for both accept timeout, TLS handshake timeout, and header read timeout, and response write timeout.

Deno.serve should also have default size limits for req.text, req.bytes, req.arrayBuffer, req.formData, and req.blob. When a user makes a request with a larger body than this default value, we'd error the request. req.body would not be subject to these limits.

The user could customize both timeouts and the size limit in Deno.serve:

Deno.serve({
  maxBodySize: 16 * 1024 * 1024, // 16MiB,
  acceptTimeout: 10000, // 10s
  tlsHandshakeTimeout: 20000, // 20s
  headerReadTimeout: 10000, // 10s,
  responseWriteTimeout: null, // no default
});

[lucacasonato]

Closing in favor of #3515