Everyone uses pm-utils still for sleep/wake support, and that's
traditionally how NM was put to sleep and woken up.  But pm-utils
uses dbus-send without --print-reply so dbus-send quits immediately
after sending the message.  That doesn't give NM enough time to
get the senders UID and thus validate the request, so the request
gets denied, and sometimes NM stays asleep after the machine is
woken up.

Instead, don't get the sender's UID and try to authorize it, but
just let the request go through.  Rely on D-Bus permissions to
make sure that only root can call sleep/wake methods.