netfilter patches for -stable

[Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>]

Hi Greg,

Would you consider to take the following patches for -stable?

e75b3e1c9bc5 netfilter: nf_flow_table: ignore DF bit setting
8437a6209f76 netfilter: nft_flow_offload: set liberal tracking mode for tcp
91a9048f2380 netfilter: nft_flow_offload: don't offload when sequence numbers need adjustment
69aeb538587e netfilter: nft_flow_offload: IPCB is only valid for ipv4 family

Users report this is fixing a connection stall in:

        https://bugzilla.kernel.org/show_bug.cgi?id=203671

Thanks.