Socket: Keep listening on a closed socket

This is a pretty specific circumstance, but it's possible the TCP transport is closed while we're still processing TLS records, in which case we'd simply be discarding that data, which is not very desirable.
Soup also already handles this and will call our recv callback with the remaining data before concluding.

src/lsocketlib.cpp

@@ -26,8 +26,7 @@ struct StandaloneSocket {
     sock->recv([](soup::Socket&, std::string&& data, soup::Capture&& cap) SOUP_EXCAL {
       StandaloneSocket& ss = *cap.get<StandaloneSocket*>();
       ss.recvd.push_back(std::move(data));
-      if (!ss.sock->remote_closed)
-        ss.recvLoop();
+      ss.recvLoop();
     }, this);
   }
 };