v0.3.0

• Total rewrite of source code.
• Major api changes:
  • breaking: Removed bind_rustls, certificate, certificate_file,
    loader, new, private_key, private_key_file, serve_and_record,
    tls_config methods from Server.
  • breaking: Removed tls module.
  • breaking: Removed record module and feature.
  • breaking: Removed Handle::listening_addrs method.
  • breaking: Server::bind method doesn't take self anymore and creates
    an Server.
  • breaking: bind method now takes a SocketAddr.
  • breaking: bind_rustls method now takes a SocketAddr and an
    tls_rustls::RustlsConfig.
  • breaking: Server::serve method now takes a MakeService.
  • breaking: Handle::listening method now returns SocketAddr.
  • added: Added Handle::connection_count that can be used to get alive
    connection count.
  • added: Added service module.
  • added: Added service::MakeServiceRef and service::SendService
    traits aliases for convenience.
  • added: Added accept module.
  • added: Added accept::Accept trait that can be implemented to modify
    io stream and service.
  • added: Added accept::DefaultAcceptor struct that implements
    accept::Accept to be used as a default 'Accept' for 'Server'.
  • added: Added Server::acceptor method that can be used to provide a
    custom accept::Accept.
  • added: Added tls_rustls module.
  • added: Added tls_rustls::RustlsAcceptor that can be used with
    Server::acceptor to make a tls Server.
  • added: Added tls_rustls::RustlsConfig to create rustls utilities and
    to provide reload functionality.
  • added: Added tls_rustls::bind_rustls which is same as bind_rustls
    function.