GObject creation cannot normally fail, except for types that implement
GInitable and take a GError in their _new() method. Some NM types
override constructor() and return NULL in some cases, but these
generally only happen in the case of programmer error (eg, failing to
set a mandatory property), and so crashing is reasonable (and most
likely inevitable anyway).
So, remove all NULL checks after calls to g_object_new() and its
myriad wrappers.
https://bugzilla.gnome.org/show_bug.cgi?id=693678
Can't leave the backup files lying around when doing 'make distcheck',
so when backup up a file, return the backup file path so that the
caller can (optionally) remove it.
Ifnet currently does not deal with user agent service. Any connection
that comes with flagged secrets or is not system connection will be
ignored by the plugin. Thanks to David Narvaez for his great help on
this problem.
When a connection changes on-disk, the in-memory copy of it may contain
transient secrets (agent-owned or not saved) that dont' get written out
to disk. When comparing the on-disk copy to the in-memory copy make sure
transient secrets are ignored so that we don't re-read the on-disk copy
needlessly.
