Implementation limitations of the sysctl core won't let /proc/sys/net
reside in a network namespace. /proc/sys/net at least must be registered
as a normal sysctl. So register /proc/sys/net early as an empty directory
to guarantee we don't violate this constraint and hit bugs in the sysctl
implementation.
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Acked-by: Pavel Emelyanov <xemul@parallels.com> Signed-off-by: David S. Miller <davem@davemloft.net>