ZF-5631: Zend_Mail needs refactoring


I will refactor Zend_Mail

Big two are following.

1) unifies _addRecipient() into _addRecipient AndHeader()

2) makes _formatAddress() . It is used by setFrom() and _addRecipient AndHeader()


Solved in SVN r13804

I copied to 1.7 branch at SVN r13886.

needs some more fix

I ensure to be released in 1.7.5 .