pkg/utils: add functions to work with sysctl
pkg/utils: add functions to work with sysctl

steveeJ/cni,tomdee/cni,appc/cni,appc/cni,mcastelino/cni,tangle329/cni,dcbw/cni,kad/cni,achanda/cni,rosenhouse/cni,dcbw/cni,murat1985/cni,containernetworking/plugins,squaremo/cni,containernetworking/plugins,luxas/cni,rosenhouse/cni,mcastelino/cni,squeed/plugins,murat1985/cni,containernetworking/cni,tangle329/cni,luxas/cni,containernetworking/cni,achanda/cni,tomdee/cni,squeed/plugins,squaremo/cni,steveeJ/cni,kad/cni