Don't update the host-name field in dhclient.conf when not hardcoded.
Don't update the host-name field in dhclient.conf when not hardcoded.

On Debian and Ubuntu, the default host-name field in dhclient.conf is
set to either "<hostname>" or "gethostname()" both of which get replaced
by the machine's hostname at query time.

The sed call currently present in lxc-clone hardcodes the hostname in
dhclient.conf, causing dpkg to prompt on isc-dhcp updates.

Signed-off-by: Stéphane Graber <089afc6d81f66f1168a9849e15660feae286e024@ubuntu.com>

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