This patch makes it such that plugin initialization is synchronized
based on the plugin name and not globally
Signed-off-by: Darren Shepherd <darren@rancher.com>
Check if there is a plugin socket first under `/run/docker/plugins/NAME.sock`.
If there is no socket for a plugin, check `/etc/docker/plugins/NAME.spec` and
`/usr/lib/docker/plugins/NAME.spec` for spec files.
Signed-off-by: David Calavera <david.calavera@gmail.com>