Conform to function declaration standards

- declare desc variable
- declare all positional arguments
- set the cmd
- properly handle DOKKU_APP_NAME

subcommands/restart

@@ -5,10 +5,14 @@ source "$PLUGIN_BASE_PATH/common/functions"
 source "$(dirname "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)")/functions"
 
 postgres-restart-cmd() {
-  [[ -z $2 ]] && dokku_log_fail "Please specify a name for the service"
-  verify_service_name "$2"
-  service_stop "$2"
-  service_start "$2"
+  declare desc="graceful shutdown and restart of the $PLUGIN_SERVICE service container"
+  local cmd="$PLUGIN_COMMAND_PREFIX:restart" argv=("$@"); [[ ${argv[0]} == "$cmd" ]] && shift 1
+  declare SERVICE="$1"
+
+  [[ -z "$SERVICE" ]] && dokku_log_fail "Please specify a name for the service"
+  verify_service_name "$SERVICE"
+  service_stop "$SERVICE"
+  service_start "$SERVICE"
   dokku_log_info1 "Please call dokku ps:restart on all linked apps"
 }