Improve fix for #66608

Fixed segfault with empty break

New added opcodes don't need to be resloved

Fixed bug #66608 (Incorrect behavior with nested "finally" blocks)

Preliminary function decl support

Problem: __FUNCTION__ etc don't work anymore, due to lexer/parser
interdependency.

Suppress warning "cast from pointer to integer of different size"

Refactored parameter passing mechanism.

In PHP-5.6 and below each argument passed to user function was copies on VM stack twice.
Now we always have ZEND_INIT_FCALL (or simular) opcode th

Refactored parameter passing mechanism.

In PHP-5.6 and below each argument passed to user function was copies on VM stack twice.
Now we always have ZEND_INIT_FCALL (or simular) opcode that pushes "call frame" on top of VM stack.
"Call frame" is actually the same zend_execute_data structure.
All the following ZEND_SEND instructions push arguments on top of the stack in a way that they directly comes into corresponding CV variables of the called frame. Extra arguments are copied at the end of stack frame (after all CV and TMP variables) on function enterance.

There are two minor incompatibilities:
1) It's not allowed to decalre functions redefining arguments e.g. "function foo($a,$a) {}".
2) func_get_arg() and func_get args() return the current value of argument and not the original value that was sent.

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AST stage 2.4

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

Use absolute addresses as branch targets for NEW, FE_RESET and FE_FETCH

Fix ZTS build

Fixed apply_func_t (they should be broken before)

Optimized JMPZNZ to avoid multiplication at runtime (may be it makes sense to use relative addresses everywere it'll lead to Position Independent Code)

Use ZEND_HASH_FOEACH_* instead of zend_hash_apply_*

Moved zend_literal->cache_slot right into zval.
It should be accessed using Z_CACHE_SLOT() macro.
zend_literal structure is removed.
API functions that accepted pointer to zend_literal no

Moved zend_literal->cache_slot right into zval.
It should be accessed using Z_CACHE_SLOT() macro.
zend_literal structure is removed.
API functions that accepted pointer to zend_literal now accept pointer to zval or cache_slot directly.
Calls of such functiond that now accept cache_slot need to be changed to pass -1 instead of NULL.

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Cleanup (1-st round)

Fixed char*/zend_string* mess

fixed craches at request shutdown and memory leaks

Use CV variable offset instead of CV variable number

Fixed static data cleanup

Fixed improper deallocation

Revert "Use zend_string for arg_info to fixed segfault in Zend/tests/argument_restriction_003.phpt"

This reverts commit b96318105b8a908ec3cb294b8133e36d1b8cba7a.

Use zend_string for arg_info to fixed segfault in Zend/tests/argument_restriction_003.phpt

Use better data structures (incomplete)

Use better data structures (incomplete)