Revert "stash" (pushed by accident)

This reverts commit a18bf5fc9303e2739ee7026bdb3bbf272bf4baa8.

stash

Removed EG(active_symbol_table) and use corresponding value from EG(current_execute_data)

Use reference counting instead of zval duplication

Use specialized functions instead of macros

Use optimized zend_array_dup() function. convert zend_hash_num_elements() and zend_hash_next_free_element() into macros.

Fixed resource destruction

Re-applyed Bob's patch with minor fixes

Reverted Bob's patch (it breaks many tests when run with opcache and needs to be fixed first).

Re-added fix for bug #66015 and adapted for phpng branch

Split IS_BOOL into IS_FALSE and IS_TRUE

Use zval_get_string in print_zval and propagate TSRMLS

Cleanup (1-st round)

Fixed interface constants inheritance.
Now we use IS_REFERENCE for inhereted class constants.
I might miss some edje cases.

Refactored ZVAL flags usage to simplify various checks (e.g. Z_REFCOUNTED(), candidate for GC, etc)

Changed data layout to allow more efficient operations

STR_DUP() doesn't duplicate interned strings anymore. In case new string is required STR_INIT() or STR_ALLOC() should be used.

Refactored IS_INDIRECT usage for CV and object properties to support HashTable resizing

Fixed reference counting

Fixed passing argument by refefence from internal functions

Reverted 07fcdc40a0f2af388cff2b6083149a0dd8584003

Fixed circular array copying

Refactored GC (incomplete)

Refactored EG(active_symbol_table) to be zend_array* instead of HashTable*

Review ended

Revert "An demo(for review) to show how to fix the problem(symbol table resize)"

This reverts commit 60c354510b6731ec8348af9c5e230a4859c7c383.