Implement the negative_array_index RFC

Remove local variables

This patch removes the so called local variables defined per
file basis for certain editors to properly show tab width, and
similar settings. These are mainly

Remove local variables

This patch removes the so called local variables defined per
file basis for certain editors to properly show tab width, and
similar settings. These are mainly used by Vim and Emacs editors
yet with recent changes the once working definitions don't work
anymore in Vim without custom plugins or additional configuration.
Neither are these settings synced across the PHP code base.

A simpler and better approach is EditorConfig and fixing code
using some code style fixing tools in the future instead.

This patch also removes the so called modelines for Vim. Modelines
allow Vim editor specifically to set some editor configuration such as
syntax highlighting, indentation style and tab width to be set in the
first line or the last 5 lines per file basis. Since the php test
files have syntax highlighting already set in most editors properly and
EditorConfig takes care of the indentation settings, this patch removes
these as well for the Vim 6.0 and newer versions.

With the removal of local variables for certain editors such as
Emacs and Vim, the footer is also probably not needed anymore when
creating extensions using ext_skel.php script.

Additionally, Vim modelines for setting php syntax and some editor
settings has been removed from some *.phpt files. All these are
mostly not relevant for phpt files neither work properly in the
middle of the file.

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Adios, yearly copyright ranges

Adios, yearly copyright ranges

Revert HASH_FLAG_INITIALIZED into HASH_FLAG_UNINITIALIZED.

Added specialized code for small arrays

Added specialized code for small arrays

Future-proof email addresses

Update email addresses. We're still @Zend, but future proofing it...

Use HT_MIN_SIZE when duplicating an empty array

Turn zend_hash_exists() into inline function

Remove unused ZEND_FILE_LINE in i_zval_ptr_dtor

Fixed bug #76800 (foreach inconsistent if array modified during loop)

Keep collision list ordered from higher to lower buckets.

Perform run-time binding reusing HashTable bucket (without new bucket insertion).

Use better macros

Loop optimization

Remove unused Git attributes ident

The $Id$ keywords were used in Subversion where they can be substituted
with filename, last revision number change, last changed date, and last
use

Remove unused Git attributes ident

The $Id$ keywords were used in Subversion where they can be substituted
with filename, last revision number change, last changed date, and last
user who changed it.

In Git this functionality is different and can be done with Git attribute
ident. These need to be defined manually for each file in the
.gitattributes file and are afterwards replaced with 40-character
hexadecimal blob object name which is based only on the particular file
contents.

This patch simplifies handling of $Id$ keywords by removing them since
they are not used anymore.

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API cleanup.
Removed useless filename and lineno arguments, used in DEBUG build.
The patch doesn't break source compatibility of public API (only binary compatibility).

Improved "Fast Shutdown".

Removed "dead" code (zend_hash_update() never fails)

Optimize zend_new_array() for special case, when size <= HT_MIN_SIZE

Replace unused generic zend_hash_*add_or_update() functions by compact implmentations.

_zend_hash_index_add_or_update_i() optimization

Use zend_string_release_ex() instread of zend_string_release() in places, where we sure about string persistence.