The various need_secrets() implementation do allocate a fresh GPtrArray, but
add static strings to them without dup'ing. Thus callers must _not_ free the
array elements, only the array itself. Adjust documentation and annotations
accordingly.
Also adjust the corresponding comment in the goi-list-connections.py example.
https://bugzilla.gnome.org/show_bug.cgi?id=698175
Unfortunately since libnm-glib/libnm-util make heavy use of
GHashTable and GValue, functions that deal with these types
can't be used from Python when using GObject Introspection,
since pygobject can't handle conversion between python types
and GValue/GHashTable very well. You'll likely encounter
assertions like:
ERROR:pygi-argument.c:1755:_pygi_argument_to_object: assertion failed: (g_type_info_get_tag (key_type_info) != GI_TYPE_TAG_VOID)
Aborted
