added docs for `extra_hosts` [CI SKIP]
added docs for `extra_hosts` [CI SKIP]

cdaguerre/drone,msteinert/drone,k2wanko/drone,Ablu/drone,bsauvajon/drone,romlinch/drone,lins05/drone,crhym3/drone,k2wanko/drone,chlorm-forks/drone,flyinprogrammer/drone,mvdkleijn/drone,fracting/drone,Ablu/drone,msteinert/drone,crhym3/drone,fracting/drone,jackspirou/drone,flyinprogrammer/drone,Dataman-Cloud/drone,vaijab/drone,zaro0508/drone,flyinprogrammer/drone,carnivalmobile/drone,vaijab/drone,donatj/drone,k2wanko/drone,zaro0508/drone,jackspirou/drone,mvdkleijn/drone,nils-werner/drone,mopemope/drone,NamPNQ/drone,zaro0508/drone,chlorm-forks/drone,romlinch/drone,benschumacher/drone,jdamick/drone,crhym3/drone,benschumacher/drone,cdaguerre/drone,mopemope/drone,mvdkleijn/drone,nils-werner/drone,Dataman-Cloud/drone,Dataman-Cloud/drone,carnivalmobile/drone,vtolstov/drone,jackspirou/drone,msteinert/drone,donatj/drone,fracting/drone,bsauvajon/drone,nils-werner/drone,zaro0508/drone,carnivalmobile/drone,mopemope/drone,vtolstov/drone,jdamick/drone,cdaguerre/drone,masarakki/drone,veghead/drone,donatj/drone,Ablu/drone,masarakki/drone,romlinch/drone,mvdkleijn/drone,veghead/drone,lins05/drone,NamPNQ/drone