Add syntax to remove snapshot into `lxc delete` help
Add syntax to remove snapshot into `lxc delete` help

Signed-off-by: anatoly techtonik <657222fa4408d5fb9c49497617f580f8c5974a3b@gmail.com>
yura-pakhuchiy/lxd,rrva/lxd,dustinkirkland/lxd,achanda/lxd,dvbportal/osx-lxd,ericsnowcurrently/lxd,dustinkirkland/lxd,hallyn/lxd,Skarlso/lxd,stgraber/lxd,erikmack/lxd,rrva/lxd,akshaykarle/lxd,georghopp/lxd,smoser/lxd,akshaykarle/lxd,jsavikko/lxd,sl1pm4t/lxd,rcj4747/lxd,mjeanson/lxd,smoser/lxd,Skarlso/lxd,atxwebs/lxd,stgraber/lxd,mikemccracken/lxd,jensg-st/lxd,rcj4747/lxd,jensg-st/lxd,hallyn/lxd,pcdummy/lxd,beni55/lxd,atxwebs/lxd,mjeanson/lxd,yura-pakhuchiy/lxd,lxc/lxd,chrisglass/lxd,ollie314/lxd,yura-pakhuchiy/lxd,ericsnowcurrently/lxd,hallyn/lxd,basvanbeek/lxd,lxc/lxd,dvbportal/osx-lxd,lxc/lxd,ericsnowcurrently/lxd,stgraber/lxd,erikmack/lxd,akshaykarle/lxd,jumpstarter-io/lxd,stgraber/lxd,stgraber/lxd,stgraber/lxd,atxwebs/lxd,basvanbeek/lxd,stgraber/lxd,benaryorg/lxd,mikemccracken/lxd,hallyn/lxd,georghopp/lxd,Skarlso/lxd,ollie314/lxd,dvbportal/osx-lxd,mikemccracken/lxd,georghopp/lxd,benaryorg/lxd,rrva/lxd,dustinkirkland/lxd,achanda/lxd,Skarlso/lxd,lxc/lxd,mjeanson/lxd,ollie314/lxd,beni55/lxd,pcdummy/lxd,hallyn/lxd,hallyn/lxd,chrisglass/lxd,Malizor/lxd,achanda/lxd,sl1pm4t/lxd,beni55/lxd,techtonik/lxd,jumpstarter-io/lxd,techtonik/lxd,jensg-st/lxd,jumpstarter-io/lxd,lxc/lxd,Malizor/lxd,techtonik/lxd,erikmack/lxd,smoser/lxd,basvanbeek/lxd,Malizor/lxd,jsavikko/lxd,lxc/lxd,benaryorg/lxd,atxwebs/lxd,sl1pm4t/lxd,rcj4747/lxd,chrisglass/lxd,lxc/lxd,pcdummy/lxd,jsavikko/lxd