From: Pavel Emelyanov <xemul@openvz.org>
Date: Tue, 11 Dec 2007 20:57:18 +0300

> This is the core.
> 
> Add all and default pointers on the netns_ipv4 and register
> a new pernet subsys to initialize them.
> 
> Also add the ctl_table_header to register the 
> net.ipv4.ip_forward ctl.
> 
> I don't allocate additional memory for init_net, but use
> global devinets.
> 
> Signed-off-by: Pavel Emelyanov <xemul@openvz.org>

Applied.