Revert "lxc domain allow to set peer address"

This reverts commit afee47d07c, which
added support to lxc for the "peer" attribute in domain interface <ip>
elements.

It's being removed temporarily for the release of libvirt 1.3.4
because the feature doesn't work, and there are concerns that it may
need to be modified in an externally visible manner which could create
backward compatibility problems.

src/lxc/lxc_container.c

@@ -520,7 +520,7 @@ static int lxcContainerRenameAndEnableInterfaces(virDomainDefPtr vmDef,
 
             VIR_DEBUG("Adding IP address '%s/%u' to '%s'",
                       ipStr, ip->prefix, newname);
-            if (virNetDevSetIPAddress(newname, &ip->address, &ip->peer, prefix) < 0) {
+            if (virNetDevSetIPAddress(newname, &ip->address, NULL, prefix) < 0) {
                 virReportError(VIR_ERR_SYSTEM_ERROR,
                                _("Failed to set IP address '%s' on %s"),
                                ipStr, newname);