phalcon_session_write_close()
Use session_write_close() in Phalcon\Session\Adapter::__destruct()
Optimized Phalcon\Session\Adapter
Updated CHANGELOG
Fix #1714 (finally)
Add Zend/zend_extensions.h to phalcon_c_header.php
Merge pull request #1728 from sjinks/issue-1624

Call session_write_close() from Phalcon\Session\Adapter::__destruct()