Minor cleanup in zend_do_pass_param()
Implement argument unpacking

RFC: https://wiki.php.net/rfc/argument_unpacking
Merge branch 'PHP-5.6'
Merge remote-tracking branch 'origin/master' into str_size_and_int64

Conflicts:
	Zend/zend_language_parser.y
	Zend/zend_vm_def.h
	Zend/zend_vm_execute.h
Fixed build (making zend_is_by_ref_func_arg_fetch function static)
Merge branch 'PHP-5.6'
started the porting docs/tools
Merge remote-tracking branch 'origin/master' into str_size_and_int64