net/sysctl: fix ipv4 forwarding
net/sysctl: fix ipv4 forwarding

Restore all/accept_redirects and default/forwarding after
all/forwarding as the last can influence the former two.
(see inet_forward_change in kernel)

# sysctl -w net.ipv4.conf.all.forwarding=1
net.ipv4.conf.all.forwarding = 1
# sysctl -w net.ipv4.conf.default.forwarding=1
net.ipv4.conf.default.forwarding = 1
# sysctl -w net.ipv4.conf.all.forwarding=0
net.ipv4.conf.all.forwarding = 0
# sysctl net.ipv4.conf.default.forwarding
net.ipv4.conf.default.forwarding = 0

Trigered with netns-dev test in VZ7CT with vzlinux-6-x86_64 template
v2:quirk accept_redirects instead of duplicate entries in devconfs

Signed-off-by: Pavel Tikhomirov <3e8c75167f9f00ca74287a4609f1507a2696e07e@virtuozzo.com>
Signed-off-by: Pavel Emelyanov <c9a32589e048e044184536f7ac71ef92fe82df3e@virtuozzo.com>

efiop/criu,KKoukiou/criu-remote,efiop/criu,efiop/criu,efiop/criu,KKoukiou/criu-remote,KKoukiou/criu-remote,KKoukiou/criu-remote,eabatalov/criu,KKoukiou/criu-remote,eabatalov/criu,eabatalov/criu,efiop/criu,efiop/criu,eabatalov/criu,eabatalov/criu,eabatalov/criu,KKoukiou/criu-remote