Merge pull request #325 from Silex/master

Fix outdated docs.

docs/debug.md

@@ -4,8 +4,8 @@ Random things I do to debug the containers.
 
 ## Login Shells
 
-* Create a shell in the running docker container (aka namespace) with [nsenter](https://github.com/jpetazzo/nsenter)
-* If you don't have nsenter/docker-enter, you can mount the data container and modify it with
+* Create a shell in the running docker container with `docker exec`.
+* To modify the data, you can also mount the data container and modify it with
 
         docker run --rm -it -v $OVPN_DATA:/etc/openvpn kylemanna/openvpn bash -l