New files:

Modified files:
include/net/netns/ipv6.h
include/net/ipv6.h
net/ipv6/sysctl_net_ipv6.c
net/ipv6/ip6_input.c
net/ipv6/ip6_tunnel.c
net/ipv6/af_inet6.c
include/net/dropreason-core.h
net/ipv6/exthdrs_core.c