fix: Fix bugs in new webserver (#1780)

Fixes #919.

Fixes bugs for new webserver:
- Unhandled exception when closing already closed websocket
- No pings for plain websocket connection
- Server drops websocket connection when client responds to pings but
doesn't send anything

Also changing API of ng connections. Now timeout is set by a separate
method instead of providing it for each call.

tests/common/util/TestWebSocketClient.cpp

@@ -32,6 +32,7 @@
 #include <boost/asio/ssl/verify_mode.hpp>
 #include <boost/beast/core/buffers_to_string.hpp>
 #include <boost/beast/core/flat_buffer.hpp>
+#include <boost/beast/core/role.hpp>
 #include <boost/beast/core/stream_traits.hpp>
 #include <boost/beast/http/field.hpp>
 #include <boost/beast/version.hpp>
@@ -150,8 +151,8 @@ WebSocketAsyncClient::connect(
     if (error)
         return error;
 
-    boost::beast::websocket::stream_base::timeout wsTimeout{};
-    stream_.get_option(wsTimeout);
+    boost::beast::websocket::stream_base::timeout wsTimeout =
+        boost::beast::websocket::stream_base::timeout::suggested(boost::beast::role_type::client);
     wsTimeout.handshake_timeout = timeout;
     stream_.set_option(wsTimeout);
     boost::beast::get_lowest_layer(stream_).expires_never();