ZF-5632: Validate only local part of an e-mail address with Zend_Validate_EmailAddress

Description

It should be possible to set an option for only testing against the local part of an email address. Sometimes the domain will not change or you really dont need the domain part.

Comments

I just added a complete rework of Zend_Validate_EmailAddress... this feature has also been added to incubator for tests.See SVN r17945 for details.

Implemented with r18050 for ZF 1.10