ZF-6382: Create UTF-8 validator

Description

I would like to suggest to create and supply within Zend_Validate an UTF-8 validator. This validator should asserts the data passed is valid UTF-8 string.

Invalid user-supplied UTF-8 strings could results to a major security issues. Please, take a look into http://code.google.com/docreader/… for additional information.

Thank you.

Comments

The provided usecase should be fixed by this proposal: http://framework.zend.com/wiki/display/…

Closing as "needs proposal"