Request for system-files for nftables

[jdstrand]

@kravietz

In addition, to be able to serve as a drop-in replacement for native nftables packages it also requires read-only access to /etc/nftables , thus plug system-files .

This is almost certainly better done via a snap layout since there is no guarantee the /etc/nftables on the host is compatible with the nftables in the snap. Eg:

layout:
  /etc/nftables:
    bind: $SNAP/etc/nftables

See Snap layouts for details. If you need /etc/nftables from the host, please describe why it is needed instead of a layout.