Bump ifcfg, adds ip detection support for MacOS, restores for Ubuntu 17.10+
Bump ifcfg, adds ip detection support for MacOS, restores for Ubuntu 17.10+

DXCanas/kolibri,DXCanas/kolibri,learningequality/kolibri,indirectlylit/kolibri,lyw07/kolibri,indirectlylit/kolibri,benjaoming/kolibri,mrpau/kolibri,benjaoming/kolibri,DXCanas/kolibri,learningequality/kolibri,indirectlylit/kolibri,lyw07/kolibri,mrpau/kolibri,indirectlylit/kolibri,mrpau/kolibri,learningequality/kolibri,benjaoming/kolibri,DXCanas/kolibri,mrpau/kolibri,benjaoming/kolibri,lyw07/kolibri,lyw07/kolibri,learningequality/kolibri