Merge branch '2.2' into 3.0

# Conflicts:
#	.github/workflows/testing.yml
#	gns3server/compute/docker/__init__.py
#	gns3server/compute/docker/docker_vm.py
#	gns3server/run.py
#	requirements.txt
#	setup.py
#	tests/compute/docker/test_docker_vm.py

gns3server/compute/docker/__init__.py

@@ -193,8 +193,8 @@ class Docker(BaseManager):
         if timeout is None:
             timeout = 60 * 60 * 24 * 31  # One month timeout
 
-        if path == "version":
+        if path == 'version':
-            url = "http://docker/v1.12/" + path  # API of docker v1.0
+            url = "http://docker/v1.24/" + path
         else:
             url = "http://docker/v" + DOCKER_MINIMUM_API_VERSION + "/" + path
         try:

gns3server/utils/asyncio/telnet_server.py

@@ -291,9 +291,17 @@ class AsyncioTelnetServer:
                     reader_read = await self._get_reader(network_reader)
 
                     # Replicate the output on all clients
-                    for connection in self._connections.values():
+                    for connection_key in list(self._connections.keys()):
-                        connection.writer.write(data)
+                        client_info = connection_key.get_extra_info("socket").getpeername()
-                        await connection.writer.drain()
+                        connection = self._connections[connection_key]
+
+                        try:
+                            connection.writer.write(data)
+                            await asyncio.wait_for(connection.writer.drain(), timeout=10)
+                        except:
+                            log.debug(f"Timeout while sending data to client: {client_info}, closing and removing from connection table.")
+                            connection.close()
+                            del self._connections[connection_key]
 
     async def _read(self, cmd, buffer, location, reader):
         """ Reads next op from the buffer or reader"""