Restrict lxd init to root
Restrict lxd init to root

Closes #1700

Signed-off-by: Stéphane Graber <089afc6d81f66f1168a9849e15660feae286e024@ubuntu.com>

lxc/lxd,atxwebs/lxd,lxc/lxd,hallyn/lxd,mjeanson/lxd,erikmack/lxd,atxwebs/lxd,chrisglass/lxd,atxwebs/lxd,Skarlso/lxd,techtonik/lxd,techtonik/lxd,yura-pakhuchiy/lxd,Skarlso/lxd,ollie314/lxd,Skarlso/lxd,erikmack/lxd,chrisglass/lxd,ollie314/lxd,erikmack/lxd,lxc/lxd,hallyn/lxd,techtonik/lxd,atxwebs/lxd,mjeanson/lxd,hallyn/lxd,lxc/lxd,stgraber/lxd,mjeanson/lxd,stgraber/lxd,yura-pakhuchiy/lxd,stgraber/lxd,lxc/lxd,jsavikko/lxd,stgraber/lxd,georghopp/lxd,hallyn/lxd,pcdummy/lxd,Skarlso/lxd,stgraber/lxd,jsavikko/lxd,chrisglass/lxd,pcdummy/lxd,stgraber/lxd,georghopp/lxd,lxc/lxd,pcdummy/lxd,jsavikko/lxd,lxc/lxd,georghopp/lxd,hallyn/lxd,akshaykarle/lxd,akshaykarle/lxd,hallyn/lxd,akshaykarle/lxd,yura-pakhuchiy/lxd,ollie314/lxd,stgraber/lxd