made MySQL/MySQLi forge use explicitly named KEYs, added ability to specify multi-column non-primary keys in table creation
diff --git a/user_guide/libraries/trackback.html b/user_guide/libraries/trackback.html
index f86ccca..4f60f5a 100644
--- a/user_guide/libraries/trackback.html
+++ b/user_guide/libraries/trackback.html
@@ -152,8 +152,8 @@
  blog_name varchar(100) NOT NULL,

  tb_date int(10) NOT NULL,

  ip_address varchar(16) NOT NULL,

- PRIMARY KEY (tb_id),

- KEY (entry_id)

+ PRIMARY KEY `tb_id` (`tb_id`),

+ KEY `entry_id` (`entry_id`)

 );</textarea>