further fixes on core

first shot on merging the core fro the int64 branch

Fixed dtrace support

Simplify call-frame handling

Fixed refcounting bug

cleanup

Use new zend_hash API

Fixed apply_func_args_t

Merge branch 'PHP-5.4' into PHP-5.5

Fix Linux specific fail in error traces (cherry-picked and fix for bug #67245)
Linux apparently does not like memcpy in overlapping regions...

Added vstrpprintf strpprintf to avoid duplicate string

(the function name maybe improvement)

Split IS_BOOL into IS_FALSE and IS_TRUE

Merge mainstream 'master' branch into refactoring
During merge I had to revert:
Nikita's patch for php_splice() (it probably needs to be applyed again)
Bob Weinand's patch

Merge mainstream 'master' branch into refactoring
During merge I had to revert:
Nikita's patch for php_splice() (it probably needs to be applyed again)
Bob Weinand's patches related to constant expression handling (we need to review them carefully)
I also reverted all our attempts to support sapi/phpdbg (we didn't test it anyway)

Conflicts:
Zend/zend.h
Zend/zend_API.c
Zend/zend_ast.c
Zend/zend_compile.c
Zend/zend_compile.h
Zend/zend_constants.c
Zend/zend_exceptions.c
Zend/zend_execute.c
Zend/zend_execute.h
Zend/zend_execute_API.c
Zend/zend_hash.c
Zend/zend_highlight.c
Zend/zend_language_parser.y
Zend/zend_language_scanner.c
Zend/zend_language_scanner_defs.h
Zend/zend_variables.c
Zend/zend_vm_def.h
Zend/zend_vm_execute.h
ext/date/php_date.c
ext/dom/documenttype.c
ext/hash/hash.c
ext/iconv/iconv.c
ext/mbstring/tests/zend_multibyte-10.phpt
ext/mbstring/tests/zend_multibyte-11.phpt
ext/mbstring/tests/zend_multibyte-12.phpt
ext/mysql/php_mysql.c
ext/mysqli/mysqli.c
ext/mysqlnd/mysqlnd_reverse_api.c
ext/mysqlnd/php_mysqlnd.c
ext/opcache/ZendAccelerator.c
ext/opcache/zend_accelerator_util_funcs.c
ext/opcache/zend_persist.c
ext/opcache/zend_persist_calc.c
ext/pcre/php_pcre.c
ext/pdo/pdo_dbh.c
ext/pdo/pdo_stmt.c
ext/pdo_pgsql/pgsql_driver.c
ext/pgsql/pgsql.c
ext/reflection/php_reflection.c
ext/session/session.c
ext/spl/spl_array.c
ext/spl/spl_observer.c
ext/standard/array.c
ext/standard/basic_functions.c
ext/standard/html.c
ext/standard/mail.c
ext/standard/php_array.h
ext/standard/proc_open.c
ext/standard/streamsfuncs.c
ext/standard/user_filters.c
ext/standard/var_unserializer.c
ext/standard/var_unserializer.re
main/php_variables.c
sapi/phpdbg/phpdbg.c
sapi/phpdbg/phpdbg_bp.c
sapi/phpdbg/phpdbg_frame.c
sapi/phpdbg/phpdbg_help.c
sapi/phpdbg/phpdbg_list.c
sapi/phpdbg/phpdbg_print.c
sapi/phpdbg/phpdbg_prompt.c

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Cleanup (1-st round)

Fix Linux specific fail in error traces
Linux apparently does not like memcpy in overlapping regions...

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

Changed data layout to allow more efficient operations

Refactored data structures to keep zend_object* instead of a whole zval in some places

Use ZVAL_DEREF() macro

Replaced (Z_TYPE(x) == IS_REFERENCE) with (Z_ISREF(x))

Temporary memory leak fix (should be done in a better way)

Use better data structures (incomplete)

Fixed exception constructor

Merge branch 'PHP-5.4' into PHP-5.5

Use nicer output for characters < 32 and > 126 in exception strings
Using question marks might confuse more than it helps.
Users are wondering what happened to their string...