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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Trim trailing whitespace in source code files

Trim trailing whitespace in source code files

Require ICU ≥ 50.1

Given that ICU is a set of lively developed libraries, that ICU 50.1
has been released on 2012-11-05, and PHP 7.4 is scheduled to be
released seven years after it,

Require ICU ≥ 50.1

Given that ICU is a set of lively developed libraries, that ICU 50.1
has been released on 2012-11-05, and PHP 7.4 is scheduled to be
released seven years after it, we consider it appropriate to ditch
these legacy versions.

Particularly, that would be a reasonable groundwork to implement part
two of the “Deprecate and remove INTL_IDNA_VARIANT_2003” RFC[1], namely
to default idn_to_ascii()'s and idn_to_utf8()'s $variant parameter to
INTL_IDNA_VARIANT_UTS46, which is not defined in ICU < 4.6.

See also the related discussion on internals@[2].

[1] <https://wiki.php.net/rfc/deprecate-and-remove-intl_idna_variant_2003>
[2] <http://news.php.net/php.internals/101626>ff

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Rethink conditions

Raise the requirement to ICU 56. Mixing both old and new normalizer APIs
would create too much complexity. Therefore go by the recommended ICU
version where all th

Rethink conditions

Raise the requirement to ICU 56. Mixing both old and new normalizer APIs
would create too much complexity. Therefore go by the recommended ICU
version where all the normalizer API became stable. For the older ICU,
the deprecated normalizer API is used.

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Expose functionality for NFKC_Casefold normalization

Sync normalizer_get_raw_decomposition() to allow passing form

as it is the case with the other Normalizer methods.

Replace the deprecated API by the newer one available with ICU 56+

Check feature availability as ICU < 49 is still supported

Use recommended way to handle utf*.h headers and obsolete symbols

Add normalizer_get_raw_decomposition function

Implements #76111 https://bugs.php.net/bug.php?id=76111

Cleanup (avoid string reallocations)

s/PHP Version 5/PHP Version 7/g

Follow up for d0cb7153

trailing whitespace removal

cleanup intl types

first shot remove TSRMLS_* things

's' works with size_t round 3

first show to make 's' work with size_t

master renames phase 1

ported ext/intl, bugfixes to go

Refactoring ext/intl (incompleted)

Remove executable bit from files

Fixed the common misspelling of the word occurred (occured -> occurred)

- Fixed possible efree(NULL) (bug #55296)

- Fixed possible efree(NULL) (bug #55296)