full_text: support OR query by list like ?title:list=A&title:list=B.

product/ZSQLCatalog/SearchKey/MroongaFullTextKey.py

@@ -89,6 +89,9 @@ class MroongaFullTextKey(FullTextKey):
     if match_query:
       fulltext_query += ' *S"%s"' % ' '.join(x.replace('"', '\\"') for x in match_query)
     if match_boolean_query:
+      if len(match_boolean_query) > 1 and logical_operator == 'or':
+        fulltext_query += ' %s' % ' OR '.join('(%s)' % x for x in match_boolean_query)
+      else:
         fulltext_query += ' %s' % ' '.join(match_boolean_query)
     if match_query or match_boolean_query:
       append(SimpleQuery(search_key=self,