ValuesReturnFilter implementation

[Mikhail Sahalaev <sahalaevm@yahoo.com>]

Kurt,

I have small problem I don't know how to solve and I need your advice. 
Following the design you had approved I have added filtering matched 
values routine after attribute checking in send_search_entry(). It 
deletes values that doesn't match from current entry structure. The 
problem is: this entry returns to the cash afterwards and next client 
will recieve cutted entry. How to solve this problem? Do not send entry 
to the cash if it was changed or, maybe, check if value matched before 
putting it to ber and don't touch entry at all. Also its possible to 
make copy of the entry before filtering and send to cash this copy 
after, but I don't really know how to do it.

Thanks,

Mikhail.