* PHP-7.2:
  [ci skip] Update NEWS
  [ci skip] Update NEWS
  Fix #77035: The phpize and ./configure create redundant .deps file

* PHP-7.1:
  [ci skip] Update NEWS
  Fix #77035: The phpize and ./configure create redundant .deps file

The `.deps` file(s) was once used by Automake and created to write
dependencies to it. The file creation has been removed via the commit
779c11af21cf8a627b8f2f2edef9e9073c76ed94.

The phpize and ./configure script create a redundant .deps file in a
PECL extension directory which might cause confusions why is it used.
Today it is no longer relevant so this redundant artefact can be
removed in the phpize configure script.

This patch syncs and bumps the minimum required version of Autoconf for
the `phpize.m4` script and the main `configure.ac` from previously mixed
2.64 and 2.59 to 2.68.

At the time of this writing Autoconf 2.63 is still the version on
Centos 6, however by the PHP 7.3 release current systems out there
should all have pretty much updated Autoconf versions to 2.64+ at
least. Centos 7 already has Autoconf 2.69, for example.

This provides more options to update and get current with the *nix
build system and also avoids broken builds in certain cases as pointed
out in the relevant discussion [1].

Additionally, phpize also already provides the `AX_CHECK_COMPILE_FLAG`
Autoconf Archive m4 file that has Autoconf 2.64 minimum requirement.

Autoconf 2.68 was released in 2010, 8 years ago, relative to this patch.

[1] https://github.com/php/php-src/pull/3562

Autoconf 2.50 made several changes to macro calls. These include also
arguments passed to AC_OUTPUT macro. The upgrading chapter in Autoconf
documentation include an example of using AC_OUTPUT with
AC_CONFIG_FILES and AC_CONFIG_COMMANDS:
- https://www.gnu.org/software/autoconf/manual/autoconf-2.69/html_node/Obsolete-Macros.html

PHP 5.4 to 7.1 require Autoconf 2.59+, PHP 7.2+ require Autoconf 2.64+,
and PHP 7.2 phpize script requires Autoconf 2.59+ which are all greater
than above mentioned 2.50 version. Systems out there should well support
this by now.

This patch was created with the help of autoupdate script:
autoupdate <file>

More info on where exactly this got deprecated:
- ftp://ftp.gnu.org/old-gnu/Manuals/autoconf-2.13/html_mono/autoconf.html
- ftp://ftp.auckland.ac.nz/pub/gnu/Manuals/autoconf-2.52/html_chapter/autoconf_15.html
- http://git.savannah.gnu.org/cgit/autoconf.git/tree/NEWS

Some editors utilizing .editorconfig automatically trim whitespaces. For
convenience this patch removes whitespaces in certain build files:
- ext/*/config*.m4
- configure.ac
- acinclude.m4

Autoconf doesn't mention the AC_CONFIG_HEADER macro since the v2.13
released in 1999 anywhere in the documentation. Future of this macro is
unclear and commented as possible candidate for obsoletion in the
autoconf source code. Since it is just a wrapper around the main
AC_CONFIG_HEADERS macro, the functionality is the same, and also more
clear to find it in the autoconf documentation and avoid possible future
obsoletion.

configure.ac was introduced in 2001 with automake-1.15 and autoconf-2.50
to replace the file named configure.in.
Autotools is preparing to remove configure.in in Automake 2.0.
All new software should be using configure.ac.
This also fixes Bug #69770 where extensions are creating configure.in

Signed-off-by: Brian Evans <grknight@gentoo.org>