doc(xo-server-sdn-controller): hosts must be able to reach each other (#4498)
doc(xo-server-sdn-controller): hosts must be able to reach each other (#4498)


vatesfr/xo-web,lmcro/xo-web,vatesfr/xo-web,lmcro/xo-web,lmcro/xo-web