* system-settings/plugins/keyfile/nm-keyfile-connection.[ch]: Implement.
* system-settings/plugins/keyfile/plugin.c: Work with
NMKeyfileConnections.
* system-settings/src/dbus-settings.c: Remove NMSysconfigExportedConnection.
Plugins are supposed to return NMExportedConnections now and handle the
updated(), removed(), and GetSecrets().
Store the internal list of connections in hash table to make it easier
to find duplicates.
git-svn-id: http://svn-archive.gnome.org/svn/NetworkManager/trunk@3640 4912f4e0-d625-0410-9fb7-b9a5a253dbdc
