Add --live-restore flag

This flags enables full support of daemonless containers in docker.  It
ensures that docker does not stop containers on shutdown or restore and
properly reconnects to the container when restarted.

This is not the default because of backwards compat but should be the
desired outcome for people running containers in prod.

Signed-off-by: Michael Crosby <crosbymichael@gmail.com>

man/dockerd.8.md

@@ -42,6 +42,7 @@ dockerd - Enable daemon mode
 [**--isolation**[=*default*]]
 [**-l**|**--log-level**[=*info*]]
 [**--label**[=*[]*]]
+[**--live-restore**[=*false*]]
 [**--log-driver**[=*json-file*]]
 [**--log-opt**[=*map[]*]]
 [**--mtu**[=*0*]]
@@ -195,6 +196,9 @@ is `hyperv`. Linux only supports `default`.
 **--label**="[]"
   Set key=value labels to the daemon (displayed in `docker info`)
 
+**--live-restore**=*false*
+  Enable live restore of running containers when the daemon starts so that they are not restarted.
+
 **--log-driver**="*json-file*|*syslog*|*journald*|*gelf*|*fluentd*|*awslogs*|*splunk*|*etwlogs*|*gcplogs*|*none*"
   Default driver for container logs. Default is `json-file`.
   **Warning**: `docker logs` command works only for `json-file` logging driver.