Fixed #21364 -- Specified InnoDB full-text support from MySQL 5.6.4 on

Thanks thevlad at gmail.com for the report.

docs/ref/databases.txt

@@ -209,8 +209,8 @@ in the server configuration.
 
 Until MySQL 5.5.4, the default engine was MyISAM_ [#]_. The main drawbacks of
 MyISAM are that it doesn't support transactions or enforce foreign-key
-constraints. On the plus side, it's currently the only engine that supports
-full-text indexing and searching.
+constraints. On the plus side, it was the only engine that supported full-text
+indexing and searching until MySQL 5.6.4.
 
 Since MySQL 5.5.5, the default storage engine is InnoDB_. This engine is fully
 transactional and supports foreign key references. It's probably the best