This reverts commit 9ed0ca4b.

This reverts commit 99ee95d9.

Fixed comparison with literal. Comparision with a literal (str) should always be "!=" and not "is not".

Once a client is disconnected, the ThreadLoop it is running on is stopped. This applies to ThreadLoops the that are created in the Client's __init__ method, if not loop was passed as argument. Stopping the loop is now done within the delete method of the Client.

- Client.set_security
- Client.connect_and_get_server_endpoints
- Node.get_path
- Node.get_node_class
- Node.get_attributes

Cleans up dangling file descriptors that would otherwise be leaked

Similar to https://github.com/FreeOpcUa/python-opcua/pull/945
Small test: https://pastebin.com/SxUSnFi0

* replace set/get_value(s) methods with read/write_value(s) and write to get closer to spec

* now you can limit the max amount of connections

* changed the discussed code

jonasgreen88 : fix token