add icmpv6 support

skip icmpv6 rule for iptables rules
skip icmp rule for ip6tables rules

Signed-off-by: Alexandre Derumier <aderumier@odiso.com>
Signed-off-by: Dietmar Maurer <dietmar@proxmox.com>
add ip6tables standard chains

- icmp types in reject are different than ipv4
- broadcast not exist in ipv6
- I don't think that smurf attack exist (no broadcast)

Signed-off-by: Alexandre Derumier <aderumier@odiso.com>
compile ipv6 ruleset

Signed-off-by: Alexandre Derumier <aderumier@odiso.com>
apply ipv6 ruleset

Signed-off-by: Alexandre Derumier <aderumier@odiso.com>
ip6tables : remove_pvefw_chains

Signed-off-by: Alexandre Derumier <aderumier@odiso.com>
add ipv6 examples

Signed-off-by: Alexandre Derumier <aderumier@odiso.com>