Doc: update for reduced set of configurable felix.cfg settings
Doc: update for reduced set of configurable felix.cfg settings

neiljerram/felix,beddari/calico,alexhersh/calico,nbartos/calico,TrimBiggs/calico,Metaswitch/calico,nbartos/calico,neiljerram/felix,anortef/calico,neiljerram/felix,beddari/calico,neiljerram/felix,Metaswitch/calico,anortef/calico,kasisnu/calico,alexhersh/calico,TrimBiggs/calico,matthewdupre/felix,kasisnu/calico,ocadotechnology/calico,matthewdupre/felix,ocadotechnology/calico