Merge branch 'refactoring2' of github.com:zendtech/php into refactoring2
Fixed memory leaks
Fixed double free
Fixed memory leak
for some reason gcc -O2 compiled the previous code in unexpected way
Fix argument unpacking
Fixed test (order of variables doesn't mater)
Fixed test (now string data allocated together with zend_string structure)
Temporary fix for Zend/tests/bug46238.phpt
Copy varname before unset

Otherwise we get issues when the varname variable coincides with
the variable that is deleted.
Fixed interface constants inheritance.
Now we use IS_REFERENCE for inhereted class constants.
I might miss some edje cases.
Fixed passing arguments by reference into array_walk() callbacks.
Refactor simpleXML (compilable, but incompleted)
Merge branch 'refactoring2' of github.com:zendtech/php into refactoring2
Fixed libxml handling default context
Fixed double free
Fixed sxe object clone
Fixed SXE iterator(14 tests fail)
Fixed nested GC calls (valgrind error in Zend/tests/gc_016.phpt)
The test works out of the box