dotcloud/docker — pull request #1497 by vincentbernat (2013-08-11 09:52:43+00:00)
Title: runtime: correctly detect IPv4 forwarding

When memory cgroup is absent, there was not attempt to detect if IPv4
forwarding was enabled and therefore, docker was printing a warning
for each command spawning a new container. The test for IPv4
forwarding was guarded by the test for memory cgroup.