by Wen Heping.
Changelog:
QA release - stable.
* Updated minimum dependencies (Net_SMTP, PEAR, PHP)
* Doc Bug #15620 Licence change to BSD
* Bug #13659 Mail parse error in special condition
* Bug #16200 - Security hole allow to read/write Arbitrary File
* _hasUnclosedQuotes() doesn't properly handle a double slash before an end
quote (slusarz at curecanti.org, Bug #9137).
* Make sure Net_SMTP is defined when calling getSMTPObject() directly
(slusarz at curecanti.org, Bug #13772).
* Add addServiceExtensionParameter() to the SMTP driver
(slusarz at curecanti.org, Bug #13764).
* Add a method to obtain the Net_SMTP object from the SMTP driver
(slusarz at curecanti.org, Bug #13766).