implement cgmanager nrtasks
implement cgmanager nrtasks

This op will be used on older kernels where container shutdown via reboot(2)
is not implemented and we use the utmp watching code.

Signed-off-by: Dwight Engen <1793d65cf7b9eefb2bb8f5bee9a4b8ba782c26da@oracle.com>
Acked-by: Serge E. Hallyn <3df611b026e4639bee8aef7a4beb2e39fcebb313@ubuntu.com>

LynxChaus/lxc,aeris/lxc,Pelagicore/lxc,regit/lxc,ioops/lxc,rowhit/lxc,hallyn/lxc,ecarrara/lxc,hfuCN/lxc,yubo/lxc,armcc/lxc,thmo/lxc,Pelagicore/lxc,major/lxc,ioops/lxc,lisongmin/lxc,QingweiPeterLan/cs188-lxc,thmo/lxc,bmoar/lxc,caglar10ur/lxc,jirislaby/lxc,ojkastl/lxc_Patches,bostjan/lxc,ecarrara/lxc,armcc/lxc,jirislaby/lxc,akshaykarle/lxc,christiaan/lxc,ksperis/lxc,regit/lxc,efiop/lxc,rldleblanc/lxc,hkjolhede/lxc,weizhenwei/lxc,yubo/lxc,ysbnim/lxc,LynxChaus/lxc,akshaykarle/lxc,GreatFruitOmsk/lxc,federicobriata/lxc,codebauss/lxc,lisongmin/lxc,hkjolhede/lxc,efiop/lxc,ojkastl/lxc_Patches,terceiro/lxc,yubo/lxc,GreatFruitOmsk/lxc,hfuCN/lxc,codebauss/lxc,cjwatson/lxc,ojkastl/lxc_Patches,caglar10ur/lxc,fwilson42/lxc,aeris/lxc,Distrotech/lxc,hfuCN/lxc,tych0/lxc,terceiro/lxc,ksperis/lxc,rldleblanc/lxc,lisongmin/lxc,ojkastl/lxc_Patches,virajs/lxc,ss1h2a3tw/lxc,tych0/lxc,weizhenwei/lxc,federicobriata/lxc,rowhit/lxc,sapun/lxc,armcc/lxc,JohnPeacockMessageSystems/lxc,JohnPeacockMessageSystems/lxc,bostjan/lxc,lazy404/lxc,cjwatson/lxc,QingweiPeterLan/cs188-lxc,caglar10ur/lxc,ecarrara/lxc,christiaan/lxc,szaszg/lxc,codebauss/lxc,hallyn/lxc,szaszg/lxc,GreatFruitOmsk/lxc,Ponce/lxc,bostjan/lxc,lazy404/lxc,lazy404/lxc,Distrotech/lxc,Distrotech/lxc,efiop/lxc,major/lxc,ss1h2a3tw/lxc,raspberrypython/lxc,ss1h2a3tw/lxc,tych0/lxc,ysbnim/lxc,terceiro/lxc,szaszg/lxc,ksperis/lxc,sapun/lxc,bmoar/lxc,regit/lxc,weizhenwei/lxc,christiaan/lxc,Pelagicore/lxc,thmo/lxc,DarknessBeforeDawn/lxc,DarknessBeforeDawn/lxc,federicobriata/lxc,raspberrypython/lxc,JohnPeacockMessageSystems/lxc,akshaykarle/lxc,rowhit/lxc,raspberrypython/lxc,aeris/lxc,DarknessBeforeDawn/lxc,cjwatson/lxc,fwilson42/lxc,ioops/lxc,hkjolhede/lxc,QingweiPeterLan/cs188-lxc,LynxChaus/lxc,Ponce/lxc,virajs/lxc,major/lxc,rldleblanc/lxc,Ponce/lxc,sapun/lxc,bmoar/lxc,hallyn/lxc,ysbnim/lxc,fwilson42/lxc,virajs/lxc,jirislaby/lxc