xtables: Do not pass nft_handle to do_parse()

Make it fit for sharing with legacy iptables, drop nft-specific
parameter. This requires to mirror proto_parse and post_parse callbacks
from family_ops somewhere reachable - use xt_cmd_parse, it holds other
"parser setup data" as well.

Signed-off-by: Phil Sutter <phil@nwl.cc>
8 files changed