Fix segfaults attribute to missing options

In cases where the remote client culls options to a command, we need to
be sure that the lookup for that flag does not result in a nil pointer.
To do so, we add a Remote attribute to the podman struct and then cli
helper funcs are now aware they are remote.

Signed-off-by: baude <bbaude@redhat.com>

cmd/podman/start.go

@@ -25,6 +25,7 @@ var (
 		RunE: func(cmd *cobra.Command, args []string) error {
 			startCommand.InputArgs = args
 			startCommand.GlobalFlags = MainGlobalOpts
+			startCommand.Remote = remoteclient
 			return startCmd(&startCommand)
 		},
 		Example: `podman start --latest