lxc-setuid: use POSIX shell instead of bash
lxc-setuid: use POSIX shell instead of bash

Avoid getop --longoptions.

Signed-off-by: Natanael Copa <d6dfbe96822fc6f407d114112670f8d1571509f1@alpinelinux.org>
Acked-by: Stéphane Graber <089afc6d81f66f1168a9849e15660feae286e024@ubuntu.com>

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