change version to 2.0.0.rc4 in configure.ac
change version to 2.0.0.rc4 in configure.ac

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

akshaykarle/lxc,ss1h2a3tw/lxc,terceiro/lxc,tych0/lxc,hallyn/lxc,aeris/lxc,cjwatson/lxc,caglar10ur/lxc,aeris/lxc,caglar10ur/lxc,QingweiPeterLan/cs188-lxc,hallyn/lxc,GreatFruitOmsk/lxc,QingweiPeterLan/cs188-lxc,hfuCN/lxc,tych0/lxc,terceiro/lxc,LynxChaus/lxc,LynxChaus/lxc,LynxChaus/lxc,GreatFruitOmsk/lxc,hallyn/lxc,aeris/lxc,ss1h2a3tw/lxc,thmo/lxc,hfuCN/lxc,akshaykarle/lxc,federicobriata/lxc,ysbnim/lxc,federicobriata/lxc,ss1h2a3tw/lxc,tych0/lxc,GreatFruitOmsk/lxc,cjwatson/lxc,federicobriata/lxc,ysbnim/lxc,cjwatson/lxc,caglar10ur/lxc,hfuCN/lxc,thmo/lxc,ysbnim/lxc,thmo/lxc,akshaykarle/lxc,QingweiPeterLan/cs188-lxc,terceiro/lxc