Delegate validation tasks to the volume drivers. It's up to them
to decide whether a name is valid or not.
Restrict volume names for the local driver to prevent creating
mount points outside docker's volumes directory.
Signed-off-by: David Calavera <david.calavera@gmail.com>
Upstream-commit: d6d60287ee3a8a064340582d65c131181ae77127
Component: engine
f1b2a78ca3