Upstream commit v3.5-rc1~109^2~138^2~4 ("netfilter: ip6_tables: add
flags parameter to ipv6_find_hdr()") changed the offset parameter of
ipv6_find_hdr() to be an input-output value. Moreover, if it is
non-zero, it MUST point to a valid IPv6 header embedded in the
packet.
Since the last merge of the "api35" branch, further changes were
included into nf-next. This set of three commits updates the
xtables-addons API to match that.
