discuss: NM server defaults

[Colin Walters <walters verbum org>]

So I filed this downstream:

https://bugzilla.redhat.com/show_bug.cgi?id=978081

But it seems like something worth talking about here.   We could easily
maintain nm-server-defaults.conf in the upstream git repo, at least.  We
could also add --enable-server-defaults as a build time option, for
OS builders that do servers and clients as separate builds from source
instead of packages.

Collecting some comments from IRC:

<danw> we'll probably want ignore-carrier=* too