Fix typo in docs for docker run -dns
Merge pull request #1494 from KSid/typo-docs-run-command

* Documentation: Fix typo in docs for docker run -dns
Add ability to specify alternate LXC config template file.

Does not "stick" in images.

Either:
  * to the server as a whole with the -T option with docker -d
  * on a specific run with the -T option to docker run
  * during container build with DockerLxcTemplate in the
    directory along side Dockerfile