It's about time to let folks not hit 'vfs', when 'overlay' is supported
on their kernel. Especially now that v3.18.y is a long-term kernel.
Signed-off-by: Vincent Batts <vbatts@redhat.com>
Upstream-commit: 2c72ff1dbfa83aa8f797bdfebaacb8a919677326
Component: engine