Don't emit "unmanaged-specs-changed" signal in read_one_connection(),
because it causes that next connections are not listed (get_connections() is
called prematurely and only connections read so far are available).
Steps to reproduce the bug:
1) create ifcfg-fake
DEVICE=loremipsum
HWADDR=01:02:03:04:05:06
NM_CONTROLLED=no
2) restart NetworkManager
3) only connections read *before* ifcfg-fake are available
Thanks to Robert Vogelgesang <vogel@users.sourceforge.net> for updating
the patch and analysis!
bfbf5ef374