publish: don't include files not owned by the container
publish: don't include files not owned by the container

If a file is owned by a user or group not mapped into the
container, refuse to publish it.

Signed-off-by: Serge Hallyn <3df611b026e4639bee8aef7a4beb2e39fcebb313@ubuntu.com>

chrisglass/lxd,georghopp/lxd,mjeanson/lxd,smoser/lxd,stgraber/lxd,beni55/lxd,rrva/lxd,atxwebs/lxd,hallyn/lxd,dvbportal/osx-lxd,ollie314/lxd,hallyn/lxd,techtonik/lxd,lxc/lxd,dustinkirkland/lxd,pcdummy/lxd,pcdummy/lxd,yura-pakhuchiy/lxd,jensg-st/lxd,ollie314/lxd,sl1pm4t/lxd,mikemccracken/lxd,akshaykarle/lxd,rcj4747/lxd,beni55/lxd,lxc/lxd,Malizor/lxd,ericsnowcurrently/lxd,jumpstarter-io/lxd,ericsnowcurrently/lxd,Skarlso/lxd,Skarlso/lxd,dustinkirkland/lxd,georghopp/lxd,rrva/lxd,lxc/lxd,mjeanson/lxd,achanda/lxd,Skarlso/lxd,stgraber/lxd,dvbportal/osx-lxd,jumpstarter-io/lxd,jumpstarter-io/lxd,hallyn/lxd,lxc/lxd,jensg-st/lxd,akshaykarle/lxd,smoser/lxd,jensg-st/lxd,benaryorg/lxd,dvbportal/osx-lxd,chrisglass/lxd,chrisglass/lxd,achanda/lxd,mikemccracken/lxd,erikmack/lxd,atxwebs/lxd,Malizor/lxd,hallyn/lxd,benaryorg/lxd,georghopp/lxd,mikemccracken/lxd,sl1pm4t/lxd,ericsnowcurrently/lxd,rcj4747/lxd,Malizor/lxd,stgraber/lxd,mjeanson/lxd,beni55/lxd,jsavikko/lxd,jsavikko/lxd,sl1pm4t/lxd,atxwebs/lxd,erikmack/lxd,rrva/lxd,akshaykarle/lxd,pcdummy/lxd,dustinkirkland/lxd,stgraber/lxd,lxc/lxd,hallyn/lxd,rcj4747/lxd,yura-pakhuchiy/lxd,erikmack/lxd,ollie314/lxd,Skarlso/lxd,lxc/lxd,yura-pakhuchiy/lxd,jsavikko/lxd,stgraber/lxd,techtonik/lxd,stgraber/lxd,hallyn/lxd,techtonik/lxd,achanda/lxd,lxc/lxd,atxwebs/lxd,stgraber/lxd,smoser/lxd,benaryorg/lxd