The three assignments above this line are still broken - they assume
that byte offsets in one encoding directly map to byte offsets in
another encoding.

I'm fixing the length here because it is the one causing out-of-bounds
reads and is easy to fix. For the others we'd have to actually compute
new offsets.

Code that explicitly exists to handle an incompatible internal
encoding should not assert that the internal encoding is compatible.

This reverts commit 86de7963fe69638431c0aa8f413d25e01bf99d68.

Affected extensions:
- opcache (use pcre)
- mbstring (removed ereg functions overloading)
- pgsql (use pcre)
- reflection (test cases using 'ereg')

SAPI:
- apache (header only)
- apache_hooks (header only)

* master: (41 commits)
  fix test - output can be chunked
  fix test
  fix test
  Fixed test for commit 997be125eb0228c5b1b6dd278f617791e71192c6
  Add bug fix to NEWS
  Update UPGRADING according to bug fix
  fix test
  improve CURL tests to allow testing without separate server
  improve CURL tests to allow testing without separate server
  Fixed bug #67199	mb_regex_encoding mishmash
  Fix bug #67248 (imageaffinematrixget missing check of parameters)
  Fix bug #67247	spl_fixedarray_resize integer overflow
  fix news
  add tests stuff to README
  Updated NEWS
  Fix Linux specific fail in error traces (cherry-picked and fix for bug #67245) Linux apparently does not like memcpy in overlapping regions...
  - Fixed off-by-one in phar_build (patch by crrodriguez at opensuse dot org)
  - Move checking
  - Fixed missing NULL check in SimpleXMLElement::xpath()
  - Fixed missing NULL check
  ...

Conflicts:
	ext/bz2/bz2.c
	ext/gd/gd.c
	ext/mbstring/php_mbregex.c
	ext/session/tests/031.phpt
	ext/simplexml/simplexml.c
	ext/spl/spl_fixedarray.c

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