[3.10.y,3.16.y,4.1.y,netfilter/ipvs] please, apply 3c5ab3f395d6

[Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>]

Hi Willy, Ben & Sasha,

Please, apply this commit:

commit 3c5ab3f395d66a9e4e937fcfdf6ebc63894f028b
Author: Julian Anastasov <ja@xxxxxx>
Date:   Sat Apr 29 20:33:09 2017 +0300

    ipvs: SNAT packet replies only for NATed connections

to stable 3.2.y.

Julian made a backport for you, that is available at Netfilter's
patchwork:

        http://patchwork.ozlabs.org/patch/789258/

Thanks!