lxc-debian: adjust init system configurations
lxc-debian: adjust init system configurations

Do as much as possible to allow containers switching from non-systemd to
systemd to work as intended (but nothing that will cause side effects).
Use update-rc.d disable instead of remove so the init scripts are not
re-enabled when the package is updated

Signed-off-by: Cameron Norman <ebdc73d5d2e0ed5b9d45f08a109317f61170c5b8@gmail.com>
Acked-by: Stéphane Graber <089afc6d81f66f1168a9849e15660feae286e024@ubuntu.com>

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