* Fix gh-issue #36: Unexpected cookies sent if persistent_handle_id is used (Mike, @rcanavan, @afflerbach)
* Fix gh-issue #34: allow setting multiple headers with the same name (Mike, @rcanavan)
* Fix gh-issue #33: allow setting prodyhost request option to NULL (Mike, @rcanavan)
* Fix gh-issue #36: Unexpected cookies sent if persistent_handle_id is used (Mike, @rcanavan, @afflerbach)
* Fix gh-issue #34: allow setting multiple headers with the same name (Mike, @rcanavan)
* Fix gh-issue #33: allow setting prodyhost request option to NULL (Mike, @rcanavan)