make lxc-netstat work when /etc/mtab is not /proc/mounts
make lxc-netstat work when /etc/mtab is not /proc/mounts

like lxc-ps and lxc-ls, lxc-netstat breaks if there is not an 'lxc' cgroup
mount and /etc/mtab is not a link to /proc/mounts.
Author: Serge Hallyn <serge.hallyn@canonical.com>
Bug-Ubuntu: https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/819319
Forwarded: no

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


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