ported opcache

basic macro replacements, all at once

Update opcache for new AST structures

Remove old version PHP supports

Fixed usage after free

Fixed bug #67215 (php-cgi work with opcache, may be segmentation fault happen)

Use arena allocator for zend_class_entry, zend_op_array and zend_property_info that live till the end of request

Fixed HASH_FLAG_APPLY_PROTECTION flag usage

Optimize out useles paths

Introduced immutable arrays. They don't need to be copyed and may be used directly from SHM.

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

Use appropriate macro

Fix ZTS build

Combine HashTable.flags and HashTable.nApplyCount into single 32-bit word

Prevented unintended SHM modification

Set reference values of reference counters of not-interned strings when they are restored from SHM

Cleanup (2-nd round)

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

Fix bug #66015 by reverting "Removed operations on constant arrays."

Allocate HashTable->arData and HashTable->arHash at once

Cleanup

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

Changed data layout to allow more efficient operations