In Fedora, OVS ports are now identified in ifcfg files as
"TYPE=OVSPort", which NM doesn't recognize, and so it would ignore
those ifcfg files. Unfortunately, this meant that if auto-default
wasn't disabled, and there was no other configuration defined for the
device, then NM would create an NMDefaultWiredConnection for it and
screw things up.
So, add an "unrecognized-specs" settings plugin property, which allows
a plugin to indicate to NetworkManager that it knows of some
non-NetworkManager-supported connection defined for a device. This
will suppress default-wired connection creation for that device,
similar to the "no-auto-default" config file option, but determined by
the plugin instead of by manual configuration. Devices listed in
unrecognized-specs may still be managed by NetworkManager, unless they
are also listed in unmanaged-specs.
https://bugzilla.redhat.com/show_bug.cgi?id=1022256
Plugin owns the object and callers must reference it if they wish to use it outside
of the function they called "add" from. Likewise, callers of the ConnectionProvider's
add_connection method must also reference the returned object if they wish to
continue using it.
Add a "monitor-connection-files" config option, which can be set to
"false" to disable automatic reloading of connections on file change.
To go with this, add a new ReloadConnections method on
o.fd.NM.Settings that can be used to manually reload connections, and
add an nm-cli command to call it.
We don't always want to immediately write new connections to disk, to
facilitate "runtime" or "temporary" connections where an interface's
runtime config isn't backed by on-disk config. Also, just because
an interface's configuration is changed doesn't necessarily mean
that new configuration should be written to disk either.
Add D-Bus methods for adding new connections and for updating existing
connections that don't immediately save the connection to disk.
Also add infrastructure to indicate to plugins that the new connection
shouldn't be immediately saved if the connection was added with the
new method.
