Interned strings unification for TS/NTS

Hereby, interned strings are supported in thread safe PHP. The patch
implements two types of interned strings

- interning per process, st

Interned strings unification for TS/NTS

Hereby, interned strings are supported in thread safe PHP. The patch
implements two types of interned strings

- interning per process, strings are not freed till process end
- interning per request, strings are freed at request end

There is no runtime interning.

With Opcache, all the permanent iterned strings are copied into SHM on
startup, additional copying into SHM might happen on demand.

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Update copyright headers to 2017

further normalizations, uint vs uint32_t

fix merge mistake

yet one more replacement run

Merge branch 'PHP-7.0' into PHP-7.1

* PHP-7.0:
use already exported symbol
Revert "export symbol missing by phpdbg"

Revert "export symbol missing by phpdbg"

This reverts commit 611ab7fe5b9fe41de56c25b1d348a866794b1fb1.

Overseen strpprintf is there

Merge branch 'PHP-7.0' into PHP-7.1

* PHP-7.0:
export symbol missing by phpdbg

export symbol missing by phpdbg

HANDLE_BLOCK/UNBLOCK_INTERRUPTIONS() protection on inter-process data is completely useless now.
Historicaly, these macros were introduced as a protection from execution timeout handling, but we

HANDLE_BLOCK/UNBLOCK_INTERRUPTIONS() protection on inter-process data is completely useless now.
Historicaly, these macros were introduced as a protection from execution timeout handling, but we don't need them anymore after "safe execution timeout" implementation.
These macros are still useful to protect from termination during inner process data modification, because of OS signals (e.g. SIGTERM during OPcache SHM update).

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cast const away

fix dangling pointer, phpdbg reveals it

fix known interned strings init with TS per request

Intern some known (and offten used) strings.

bump year which is missed in rev 49493a2

Use ZSTR_ API to access zend_string elements (this is just renaming without semantick changes).

Improved zend_string API (Francois Laupretre)

Squashed commit of the following:

commit d96eab8d79b75ac83d49d49ae4665f948d15a804
Author: Francois Laupretre <francois@tekwire.net>

Improved zend_string API (Francois Laupretre)

Squashed commit of the following:

commit d96eab8d79b75ac83d49d49ae4665f948d15a804
Author: Francois Laupretre <francois@tekwire.net>
Date: Fri Jun 26 01:23:31 2015 +0200

Use the new 'ZSTR' macros in the rest of the code.

Does not change anything to the generated code (thanks to compat macros) but cleaner.

commit b3526439104ac7a89a8e0c79dbebf33b22bd01b8
Author: Francois Laupretre <francois@tekwire.net>
Date: Thu Jun 25 13:45:06 2015 +0200

Improve zend_string API

Add missing methods

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Fixed interned string leaks after new STATIC_KEY flag is introduced

Fixed zend_string related inconsistencies

Changed HashTable layout:

Removed HashTable->arHash (reduced memory consumption). Now hash slots may be accessed using HT_HASH() macro.
Hash slotas are allocated together with Buckets (b

Changed HashTable layout:

Removed HashTable->arHash (reduced memory consumption). Now hash slots may be accessed using HT_HASH() macro.
Hash slotas are allocated together with Buckets (before them) and lay in reverse order from HashTable->arData base address (see comments in Zend/zend_types.h)
Indexes in hash table and conflict resolution chains (Z_NEXT) may be stored as indeces or offsets in bytes, depending on system (32 or 64-bit).
HashTable data filelds are reordered to keep the most useful for zend_hash_find() data in the same CPU cache line.

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Limit HashTable size to avoid integer overflow checks

bump year

trailing whitespace removal

first shot remove TSRMLS_* things

fix the empty_strings SAPI shutdown leak in TS build

still the NTS variant is somewhat different as it needs
zend_new_interned_string_int because the normal callbacks might
be not in

fix the empty_strings SAPI shutdown leak in TS build

still the NTS variant is somewhat different as it needs
zend_new_interned_string_int because the normal callbacks might
be not initialized, but at least no leaks anymore and some more
structure

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fix leaking the empty_string in TS builds

that's not char * but zend_string *