lxc: Add support to lxcDomainInterfaceAddresses() function
lxc: Add support to lxcDomainInterfaceAddresses() function

LXC driver is not able to retrieve IP addresses from domains. This
function was not implemented yet. It can be done using DHCP lease and
ARP table. Different from QEMU, LXC does not have an agent to fetch
this info, but other sources can be used.

Signed-off-by: Julio Faracco <a9e27ab562b8d02c0041eb70cde6fe3858219fb7@gmail.com>
Signed-off-by: Michal Privoznik <83d82aaba2eed257f4814b0c239c260c4caaadf0@redhat.com>
Reviewed-by: Michal Privoznik <83d82aaba2eed257f4814b0c239c260c4caaadf0@redhat.com>

fabianfreyer/libvirt,olafhering/libvirt,fabianfreyer/libvirt,fabianfreyer/libvirt,nertpinx/libvirt,zippy2/libvirt,jfehlig/libvirt,jfehlig/libvirt,jardasgit/libvirt,libvirt/libvirt,jardasgit/libvirt,olafhering/libvirt,jardasgit/libvirt,libvirt/libvirt,zippy2/libvirt,crobinso/libvirt,nertpinx/libvirt,jfehlig/libvirt,libvirt/libvirt,olafhering/libvirt,olafhering/libvirt,jfehlig/libvirt,zippy2/libvirt,nertpinx/libvirt,nertpinx/libvirt,nertpinx/libvirt,fabianfreyer/libvirt,crobinso/libvirt,crobinso/libvirt,libvirt/libvirt,jardasgit/libvirt,zippy2/libvirt,crobinso/libvirt,jardasgit/libvirt,fabianfreyer/libvirt