container: Relaxes validation for security.ipv4_filtering and security.ipv6_filtering
container: Relaxes validation for security.ipv4_filtering and security.ipv6_filtering

These no longer need a static IP defined, opening the way for automatic IP allocation.

Signed-off-by: Thomas Parrott <6b778ce645fb0e3dde76d79eccad490955b1ae74@canonical.com>

hallyn/lxd,lxc/lxd,Skarlso/lxd,lxc/lxd,stgraber/lxd,stgraber/lxd,Skarlso/lxd,lxc/lxd,lxc/lxd,mjeanson/lxd,atxwebs/lxd,stgraber/lxd,stgraber/lxd,atxwebs/lxd,lxc/lxd,hallyn/lxd,Skarlso/lxd,Skarlso/lxd,stgraber/lxd,hallyn/lxd,mjeanson/lxd,stgraber/lxd,lxc/lxd,lxc/lxd,hallyn/lxd,mjeanson/lxd,atxwebs/lxd,stgraber/lxd,hallyn/lxd,hallyn/lxd,atxwebs/lxd