Use @allow-additional-options in sql-sync

sql-sync no longer shows sanitize since that requires full bootstrap. @todo - fix that.

also fix small bug when @allow-additional-optoins has no value in an Annotated command.

includes/annotationcommand_adapter.inc

@@ -469,8 +469,9 @@ function annotationcommand_adapter_get_commands_for_commandhandler($commandhandl
     if (isset($returnType)) {
       $command['return-type'] = $returnType;
     }
-    if ($additional = $commandinfo->getAnnotation('allow-additional-options')) {
-      $command['allow-additional-options'] = StringUtils::csvToArray($additional);
+    if ($commandinfo->hasAnnotation('allow-additional-options')) {
+      $additional = $commandinfo->getAnnotation('allow-additional-options');
+      $command['allow-additional-options'] = empty($additional) ? true : StringUtils::csvToArray($additional);
     }
     if ($dependencies = $commandinfo->getAnnotation('drupal-dependencies')) {
       $command['drupal dependencies'] = StringUtils::csvToArray($dependencies);

src/Commands/sql/SqlSyncCommands.php

@@ -24,7 +24,8 @@ class SqlSyncCommands extends DrushCommands
      * @option create-db Create a new database before importing the database dump on the target machine.
      * @option db-su Account to use when creating a new database (e.g. root).
      * @option db-su-pw Password for the db-su account.
-     * @allow-additional-options sql-sanitize
+     * # We cannot list sql-sanitize below since it bootstraps higher - to FULL.
+     * @allow-additional-options
      * @option sanitize Obscure email addresses and reset passwords in the user table post-sync.
      * @option confirm-sanitizations Prompt yes/no after importing the database, but before running the sanitizations.
      * @usage drush sql-sync @source @target