Merge branch 'PHP-5.4' of git.php.net:php-src into PHP-5.4

* 'PHP-5.4' of git.php.net:php-src:
  add bundled libzip LICENSE, as required by BSD License terms
5.4.23-dev
Fix bug #66008
Typo fix: umknown -> unknown
Merge branch 'PHP-5.4' of git.php.net:php-src into PHP-5.4
Fixed Bug #66034 (Segmentation Fault when constructor of PDO statement throws an exception)

I know zend_call_function will initilize retval_ptr_ptr, but still set
it to NULL explict is more readable
Merge branch 'PHP-5.4' into PHP-5.5

Conflicts:
	configure.in
	ext/mysqlnd/mysqlnd.c
	main/php_version.h
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