bring up lo upon adding netns

overlay-boot

@@ -16,7 +16,10 @@ if [ -z "$UNSHARED" ] ; then
     #
     # Create the network namespace for the subhost, then trigger
     # detached re-run with unshared mount namespace
-    [ -r /run/netns/$NAME ] || ip netns add $NAME
+    [ -r /run/netns/$NAME ] || {
+	ip netns add $NAME
+	ip netns exec $NAME ip link set lo up
+    }
     exec env UNSHARED=yes unshare -m $0 $@ > $LOG 2>&1 &
     echo "Logging to $LOG" >&2
     exit 0