Drop dead code
Add zend_add_literal_string

And simplify additional of special literals based on it.
Test use of string names with \ prefix

And drop piece of dead code
Fix detection of write to built-in function for references
Fix ct binding for cuf/cufa functions

It was checking against the wrong AST kind, so the binding was
never actually done.
Drop unused result argument
Removed useless helper
Merge branch 'master' of git.php.net:php-src

* 'master' of git.php.net:php-src:
  Drop unused result argument
  Fix ct binding for cuf/cufa functions
  Fix detection of write to built-in function for references
  Test use of string names with \ prefix
  Add zend_add_literal_string
  Drop dead code
Merge branch 'master' of git://github.com/php/php-src