change lxc-cgroup parameter checking
change lxc-cgroup parameter checking

required to support either:
lxc-cgroup -n foo subsystem value
lxc-cgroup -nfoo  subsystem value

Signed-off-by: Michel Normand <7b25cf65349c7c025c357f01f5a89ddd77138ac9@fr.ibm.com>
Signed-off-by: Daniel Lezcano <3211518dd4d87cb3f7ee12cb52e14b7fb2bc0446@fr.ibm.com>

armcc/lxc,cipriancraciun/lxc,Distrotech/lxc,rldleblanc/lxc,sapun/lxc,yubo/lxc,codebauss/lxc,Distrotech/lxc,glensc/lxc,potatosalad/lxc,LynxChaus/lxc,ioops/lxc,ss1h2a3tw/lxc,lisongmin/lxc,cjwatson/lxc,armcc/lxc,akshaykarle/lxc,szaszg/lxc,szaszg/lxc,christiaan/lxc,hkjolhede/lxc,ostap/lxc,rldleblanc/lxc,regit/lxc,Ponce/lxc,raspberrypython/lxc,hfuCN/lxc,ojkastl/lxc_Patches,hkjolhede/lxc,potatosalad/lxc,lazy404/lxc,caglar10ur/lxc,weizhenwei/lxc,DarknessBeforeDawn/lxc,ecarrara/lxc,bmoar/lxc,christiaan/lxc,terceiro/lxc,JohnPeacockMessageSystems/lxc,tych0/lxc,GreatFruitOmsk/lxc,abstrakraft/lxc-android-lxc,usc-isi/lxc,szaszg/lxc,terceiro/lxc,JohnPeacockMessageSystems/lxc,hfuCN/lxc,usc-isi/lxc,Pelagicore/lxc,ostap/lxc,DarknessBeforeDawn/lxc,hfuCN/lxc,cjwatson/lxc,aeris/lxc,tych0/lxc,rowhit/lxc,bostjan/lxc,hkjolhede/lxc,yubo/lxc,lazy404/lxc,rowhit/lxc,aeris/lxc,ysbnim/lxc,QingweiPeterLan/cs188-lxc,rldleblanc/lxc,abstrakraft/lxc-android-lxc,akshaykarle/lxc,bmoar/lxc,rowhit/lxc,major/lxc,sapun/lxc,ecarrara/lxc,virajs/lxc,ojkastl/lxc_Patches,ksperis/lxc,JohnPeacockMessageSystems/lxc,ksperis/lxc,ysbnim/lxc,smoser/lxc,federicobriata/lxc,fwilson42/lxc,codebauss/lxc,coconutpilot/lxc-gentoo-new,jirislaby/lxc,Ponce/lxc,efiop/lxc,ysbnim/lxc,Pelagicore/lxc,hallyn/lxc,thmo/lxc,armcc/lxc,caglar10ur/lxc,QingweiPeterLan/cs188-lxc,bmoar/lxc,raspberrypython/lxc,christiaan/lxc,jirislaby/lxc,LynxChaus/lxc,ecarrara/lxc,efiop/lxc,bostjan/lxc,terceiro/lxc,Pelagicore/lxc,jirislaby/lxc,federicobriata/lxc,inokappa/lxc,fwilson42/lxc,efiop/lxc,fwilson42/lxc,thmo/lxc,DarknessBeforeDawn/lxc,ojkastl/lxc_Patches,ojkastl/lxc_Patches,LynxChaus/lxc,bostjan/lxc,cipriancraciun/lxc,yubo/lxc,regit/lxc,ss1h2a3tw/lxc,lisongmin/lxc,lazy404/lxc,abstrakraft/lxc-android-lxc,sapun/lxc,glensc/lxc,ksperis/lxc,major/lxc,thmo/lxc,major/lxc,ss1h2a3tw/lxc,weizhenwei/lxc,smoser/lxc,hallyn/lxc,federicobriata/lxc,virajs/lxc,usc-isi/lxc,Distrotech/lxc,kylef/lxc,tych0/lxc,coconutpilot/lxc-gentoo-new,QingweiPeterLan/cs188-lxc,ioops/lxc,cjwatson/lxc,regit/lxc,weizhenwei/lxc,abstrakraft/lxc-android-lxc,lisongmin/lxc,ioops/lxc,glensc/lxc,caglar10ur/lxc,hallyn/lxc,GreatFruitOmsk/lxc,smoser/lxc,virajs/lxc,raspberrypython/lxc,Ponce/lxc,GreatFruitOmsk/lxc,smoser/lxc,kylef/lxc,aeris/lxc,inokappa/lxc,codebauss/lxc,akshaykarle/lxc