MultiplexedSocket: don't send EOF when receiving EOF

If we receive EOF, didn't the peer already closed the socket ?

Change-Id: I06ae908b49ddd4ba0a5eb43ff25f51da1f15cc21

src/jamidht/multiplexed_socket.cpp

@@ -421,7 +421,7 @@ MultiplexedSocket::Impl::handleChannelPacket(uint16_t channel, std::vector<uint8
     auto sockIt = sockets.find(channel);
     if (channel > 0 && sockIt->second) {
         if (pkt.size() == 0) {
-            sockIt->second->shutdown();
+            sockIt->second->stop();
             sockets.erase(sockIt);
         } else {
             sockIt->second->onRecv(std::move(pkt));
@@ -789,7 +789,6 @@ ChannelSocket::onRecv(std::vector<uint8_t>&& pkt) {
     pimpl_->cv.notify_all();
 }
 
-
 std::shared_ptr<IceTransport>
 ChannelSocket::underlyingICE() const
 {