bash completion for `--cluster-store-opt kv.path discovery.{heartbeat,ttl}`

Signed-off-by: Harald Albers <github@albersweb.de>

contrib/completion/bash/docker

@@ -774,7 +774,7 @@ _docker_daemon() {
 			return
 			;;
 		--cluster-store-opt)
-			COMPREPLY=( $( compgen -W "kv.cacertfile kv.certfile kv.keyfile" -S = -- "$cur" ) )
+			COMPREPLY=( $( compgen -W "discovery.heartbeat discovery.ttl kv.cacertfile kv.certfile kv.keyfile kv.path" -S = -- "$cur" ) )
 			__docker_nospace
 			return
 			;;