Nested db-objects

Hi all,

I find it very useful to have the ability to have the choice of using nested 
db-objects.

Example:
When integrating with external systems - it is very convenient to start a 
transaction on system 1 - do some work (like sync) on system 2 - and if things 
went well do a commit on the result in system 1.

To make this work there is a need for two tiny changes in the class.db.inc.php:

1) on line 133 in the function __clone():

change 	
	$this->new_adodb();
to
	$this->adodb = clone($this->adodb);

2) Also the new function __destruct() - which do a disconnect has to be commented

How about it?

Regards

Sigurd