wsd: close the socket when shutting down fails

Change-Id: Iea5c6a259272b6af881a5bfb27ffc31d2ad27793
Reviewed-on: https://gerrit.libreoffice.org/33424
Reviewed-by: Ashod Nakashian <ashnakash@gmail.com>
Tested-by: Ashod Nakashian <ashnakash@gmail.com>

wsd/LOOLWSD.cpp

@@ -194,6 +194,7 @@ namespace
 inline void shutdownLimitReached(LOOLWebSocket& ws)
 {
     const std::string error = Poco::format(PAYLOAD_UNAVAILABLE_LIMIT_REACHED, MAX_DOCUMENTS, MAX_CONNECTIONS);
+    LOG_INF("Sending client limit-reached message: " << error);
 
     /* loleaflet sends loolclient, load and partrectangles message immediately
        after web socket handshake, so closing web socket fails loading page in

wsd/LOOLWebSocket.hpp

@@ -223,6 +223,16 @@ public:
         {
             LOG_WRN("LOOLWebSocket::shutdown: Exception: " << exc.displayText() <<
                     (exc.nested() ? " (" + exc.nested()->displayText() + ")" : ""));
+
+            // Just close it.
+            try
+            {
+                Poco::Net::WebSocket::close();
+            }
+            catch (const std::exception&)
+            {
+                // Nothing we can do.
+            }
         }
     }
 };