API for fast construction of packed arrays
fix NULL deref when the script encoding wasn't previously set
better fix for script encoding ini
FAST_ZPP for hot functions
Fixed bug #68644 (strlen incorrect : mbstring + func_overload=2 +UTF-8 + Opcache)
Merge branch 'PHP-5.6'

Conflicts:
	ext/opcache/Optimizer/pass1_5.c
Update NEWs
Added new API function 'zend_string* zend_string_tolower(zend_string*)'.
It simplifies code and avoids unnecessary allocation and copying if string is already in lower case.
For disabled function, to disable arguments checks, we have to reset num_args and some related flags (in addition to arg_info)
No need to do this check for master, ZEND_COMPILE_NO_BUILTIN_STRLEN already cover it
Merge branch 'master' of https://git.php.net/repository/php-src
C89 compat
remove unused variable
Use zend_string_tolower in zif_strtolower
Merge branch 'master' of https://git.php.net/repository/php-src