here's info from a freshly creating unprivileged container as well as fstab:
pct config 900
arch: amd64
cores: 1
features: nesting=1
hostname: LXCTEST
memory: 512
net0: name=eth0,bridge=vmbr0,hwaddr=BC:24:11:15:7C:0A,ip=dhcp,link_down=1,type=veth
ostype: debian
rootfs...