This adds mesh_on_lan functionality.

A new optional site.conf option, mesh_on_lan, has been added. If set to
'true', all LAN ports will be used for meshing instead of being part of
the client bridge.

There is no "enabled" attribute in the autoupdater section, and there has never
been.

This PR documents functionality added by
https://github.com/freifunk-gluon/packages/pull/95

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

noob-proofing a bit

The community has been renamed from Oldenburg (ffol) to Nordwest (ffnw) to include other cities. Also the git url has changed.

Added Braunschweig to site-repos in the wild

This chapter is no longer needed (duplicate content).
The content is alrady in http://gluon.readthedocs.org/en/latest/user/getting_started.html#getting-started .

This chapter is no longer needed (duplicate content).
The content is alrady in http://gluon.readthedocs.org/en/latest/user/getting_started.html#getting-started .

add information about the environment variables.