Merge pull request #2676 from sdurrheimer/zsh-completion-down-command

Add zsh completion for 'docker-compose down'

contrib/completion/zsh/_docker-compose

@@ -203,6 +203,12 @@ __docker-compose_subcommand() {
                 '(--quiet -q)'{--quiet,-q}"[Only validate the configuration, don't print anything.]" \
                 '--services[Print the service names, one per line.]' && ret=0
             ;;
+        (down)
+            _arguments \
+                $opts_help \
+                "--rmi[Remove images, type may be one of: 'all' to remove all images, or 'local' to remove only images that don't have an custom name set by the 'image' field]:type:(all local)" \
+                '(-v --volumes)'{-v,--volumes}"[Remove data volumes]" && ret=0
+            ;;
         (events)
             _arguments \
                 $opts_help \