Add option to disable networking to urbi-console.
Add option to disable networking to urbi-console.

	* src/console-server.cc(main)(usage): add -n, --no-network.

Signed-off-by: Matthieu Nottale <73d816bf5a7c98ca49eb19b3fa4036e0ae653e5f@gostai.com>

urbiforge/urbi,aldebaran/urbi,urbiforge/urbi,aldebaran/urbi,urbiforge/urbi,urbiforge/urbi,urbiforge/urbi,aldebaran/urbi,aldebaran/urbi,aldebaran/urbi,aldebaran/urbi,aldebaran/urbi,urbiforge/urbi,urbiforge/urbi,aldebaran/urbi,urbiforge/urbi,urbiforge/urbi