Jiří Klimeš authored Mar 06, 2015 and Lubomir Rintel committed Aug 31, 2015

[lkundrak@v3.sk: libnm and libnm-gtk can't mix; use libnma instead.]

[lkundrak@v3.sk: retain also the libnm-glib version of the properties plugin

[lkundrak@v3.sk: avoid NMVpnPluginOld use.]