Optimize levenshtein a bit for memory usage (#13830)

When all costs are equal, levenshtein fulfills the requirements
of being a metric. A metric is symmetric, so we can swap the strings

Optimize levenshtein a bit for memory usage (#13830)

When all costs are equal, levenshtein fulfills the requirements
of being a metric. A metric is symmetric, so we can swap the strings in
that case. Since we use rows of a partial matrix of length |string2| we
can make the choice of using string1 instead if |string1| < |string2|,
which will optimize memory usage and CPU time.

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Update http->https in license (#6945)

1. Update: http://www.php.net/license/3_01.txt to https, as there is anyway server header "Location:" to https.
2. Update few license 3.0 to 3.01 as

Update http->https in license (#6945)

1. Update: http://www.php.net/license/3_01.txt to https, as there is anyway server header "Location:" to https.
2. Update few license 3.0 to 3.01 as 3.0 states "php 5.1.1, 4.1.1, and earlier".
3. In some license comments is "at through the world-wide-web" while most is without "at", so deleted.
4. fixed indentation in some files before |

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Remove string length limit from levenshtein()

As noted on https://bugs.php.net/bug.php?id=80073, I don't think
having this limitation makes sense. The similar_text() function
has muc

Remove string length limit from levenshtein()

As noted on https://bugs.php.net/bug.php?id=80073, I don't think
having this limitation makes sense. The similar_text() function
has much worse asymptotic complexity than levenshtein() and does
not enforce such a limitation. levenshtein() does have fairly high
memory requirements, but they are a fixed factor of the string
length (and subject to memory limit).

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Refactor levenshtein()

Closes GH-5816

Remove proto comments from C files

Closes GH-5758

Use RETURN_THROWS() when an exception is thrown

Closes GH-5036

Remove mention of PHP major version in Copyright headers

Closes GH-4732.

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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Remove yearly range from copyright notice

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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year++

Update copyright headers to 2017

Merge branch 'PHP-5.6' into PHP-7.0

* PHP-5.6:
Happy new year (Update copyright to 2016)

Happy new year (Update copyright to 2016)

bump year

bump year

first shot remove TSRMLS_* things

exhaust zend_long/size_t potential in levenstein

s/PHP 5/PHP 7/

first show to make 's' work with size_t

master renames phase 1

yet more fixes to zpp

fix macros in the 5 basic extensions

Bump year

Happy New Year