Clarify behaviour of restart policy in run ref doc
Clarify behaviour of restart policy in run ref doc

This clarifies that the behaviour of `unless-stopped` will restart the container on daemon start.  This was implied before, but now the restart-on-daemon-start behaviour is mentioned directly.

Signed-off-by: David Beitey <aa743a0aaec8f7d7a1f01442503957f4d7a2d634@davidjb.com>

cpuguy83/cli,cpuguy83/cli,thaJeztah/cli,docker/cli,thaJeztah/cli,docker/cli