lxc-alpine: use getopt to parse options
lxc-alpine: use getopt to parse options

Signed-off-by: Kaarle Ritvanen <68c9754ab73f31571ff6a051d9bb6ab0661dfd16@datakunkku.fi>
Acked-by: Stéphane Graber <089afc6d81f66f1168a9849e15660feae286e024@ubuntu.com>

caglar10ur/lxc,hfuCN/lxc,tych0/lxc,armcc/lxc,ss1h2a3tw/lxc,GreatFruitOmsk/lxc,hfuCN/lxc,Distrotech/lxc,Ponce/lxc,cjwatson/lxc,tych0/lxc,armcc/lxc,GreatFruitOmsk/lxc,Distrotech/lxc,ysbnim/lxc,thmo/lxc,fwilson42/lxc,DarknessBeforeDawn/lxc,cjwatson/lxc,aeris/lxc,LynxChaus/lxc,ysbnim/lxc,QingweiPeterLan/cs188-lxc,akshaykarle/lxc,Ponce/lxc,terceiro/lxc,hallyn/lxc,federicobriata/lxc,terceiro/lxc,thmo/lxc,ss1h2a3tw/lxc,akshaykarle/lxc,ksperis/lxc,hfuCN/lxc,hallyn/lxc,DarknessBeforeDawn/lxc,terceiro/lxc,tych0/lxc,cjwatson/lxc,armcc/lxc,caglar10ur/lxc,ysbnim/lxc,Ponce/lxc,Distrotech/lxc,fwilson42/lxc,akshaykarle/lxc,LynxChaus/lxc,DarknessBeforeDawn/lxc,bostjan/lxc,bostjan/lxc,aeris/lxc,hallyn/lxc,thmo/lxc,QingweiPeterLan/cs188-lxc,caglar10ur/lxc,bostjan/lxc,QingweiPeterLan/cs188-lxc,ksperis/lxc,GreatFruitOmsk/lxc,LynxChaus/lxc,ss1h2a3tw/lxc,aeris/lxc,federicobriata/lxc,ksperis/lxc,fwilson42/lxc,federicobriata/lxc