Don't link against openssl 1.1 in curl

OpenSSL 1.1 does not need crypto locking callbacks, so avoid
detecting and linking against it in the first place.

Fix bug #79063: Curl openssl does not respect PKG_CONFIG_PATH

Clean up curl openssl check

Only set HAVE_CURL_OPENSSL flag, and remove Windows specific code,
as all of this is only relevant for OpenSSL < 1.1, which is not
used on Windows.

Remove unused defines

Used in php-src the past and today removed and not used anymore:
- HAVE_CURL_EASY_STRERROR
- HAVE_CURL_MULTI_STRERROR
- HAVE_NEW_MIME2TEXT
- HAVE_MBSTR_

Remove unused defines

Used in php-src the past and today removed and not used anymore:
- HAVE_CURL_EASY_STRERROR
- HAVE_CURL_MULTI_STRERROR
- HAVE_NEW_MIME2TEXT
- HAVE_MBSTR_CN
- HAVE_MBSTR_JA
- HAVE_MBSTR_KR
- HAVE_MBSTR_RU
- HAVE_MBSTR_TW

Part of oniguruma which doesn't use these anymore
- NOT_RUBY
- HAVE_STDARG_PROTOTYPES

Unused:
- HAVE_MPIR

Closes GH-4427

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Remove duplicate AC_PROG_CPP call

AC_PROG_CPP is already called in configure.ac.

Closes GH-4425

Don't warn if libcurl SSL library not detected

libcurl may link against 7 different ssl libraries, all of which
are thread-safe -- apart from openssl, of course. We check for
openssl

Don't warn if libcurl SSL library not detected

libcurl may link against 7 different ssl libraries, all of which
are thread-safe -- apart from openssl, of course. We check for
openssl and register locking callbacks in that case, but we should
not warn if any other library is used.

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Preserve CFLAGS/LDFLAGS for curl ssl check

We need to add the curl-specific flags, but we also need to preserve
the general flags, to keep around important stuff like -m32.

Normalize comments in *nix build system m4 files

Normalization include:
- Use dnl for everything that can be ommitted when configure is built in
favor of the shell comment characte

Normalize comments in *nix build system m4 files

Normalization include:
- Use dnl for everything that can be ommitted when configure is built in
favor of the shell comment character # which is visible in the output.
- Line length normalized to 80 columns
- Dots for most of the one line sentences
- Macro definitions include similar pattern header comments now

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Remove curl gnutls locking

This is only relevant for the gcrypt backend, which is no longer in
use. I couldn't find any hard info on when exactly gcrypt support was
dropped, but nett

Remove curl gnutls locking

This is only relevant for the gcrypt backend, which is no longer in
use. I couldn't find any hard info on when exactly gcrypt support was
dropped, but nette is the default since 2.11.1. Most code that still
has the gcrypt handling is checking against < 2.12. In either case,
those versions were released in 2010/2011.

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Add AS_HELP_STRING to *nix build configure options

The Autoconf's default AS_HELP_STRING macro can properly format help
strings [1] so watching out if columns are aligned manually is not

Add AS_HELP_STRING to *nix build configure options

The Autoconf's default AS_HELP_STRING macro can properly format help
strings [1] so watching out if columns are aligned manually is not
anymore.

[1] https://www.gnu.org/software/autoconf/manual/autoconf.html#Pretty-Help-Strings

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Migrate ext/zlib to use pkg-config

There are other extensions checking for zlib as well, not quite
sure what to do there with regard to option names.

ext/curl: port to pkg-config macro and consistently require its use

curl 7.15.1 in December 2006 first added pkg-config support, which is
earlier than the minimum supported version for p

ext/curl: port to pkg-config macro and consistently require its use

curl 7.15.1 in December 2006 first added pkg-config support, which is
earlier than the minimum supported version for php. This should
therefore be uiversally supported.

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Trim trailing whitespace in source code files

Trim trailing whitespace in source code files

Replace obsolete AC_TRY_FOO with AC_FOO_IFELSE

Autoconf 2.50 released in 2001 made several macros obsolete including
the AC_TRY_RUN, AC_TRY_COMPILE and AC_TRY_LINK:
http://git.savann

Replace obsolete AC_TRY_FOO with AC_FOO_IFELSE

Autoconf 2.50 released in 2001 made several macros obsolete including
the AC_TRY_RUN, AC_TRY_COMPILE and AC_TRY_LINK:
http://git.savannah.gnu.org/cgit/autoconf.git/tree/ChangeLog.2

These macros should be replaced with the current AC_FOO_IFELSE instead:
- AC_TRY_RUN with AC_RUN_IFELSE and AC_LANG_SOURCE
- AC_TRY_LINK with AC_LINK_IFELSE and AC_LANG_PROGRAM
- AC_TRY_COMPILE with AC_COMPILE_IFELSE and AC_LANG_PROGRAM

PHP 5.4 to 7.1 require Autoconf 2.59+ version, PHP 7.2 and above require
2.64+ version, and the PHP 7.2 phpize script requires 2.59+ version which
are all greater than above mentioned 2.50 version therefore systems
should be well supported by now.

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

Reference docs:
- https://www.gnu.org/software/autoconf/manual/autoconf-2.69/html_node/Obsolete-Macros.html
- https://www.gnu.org/software/autoconf/manual/autoconf-2.59/autoconf.pdf

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Trim trailing whitespaces in build files

Some editors utilizing .editorconfig automatically trim whitespaces. For
convenience this patch removes whitespaces in certain build files:
-

Trim trailing whitespaces in build files

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

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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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Bump libcurl requirement to 7.15.5

The existence of the following functions is now guaranteed:
* curl_escape()
* curl_unescape()
* curl_multi_setopt()

libcurl 7.15.5

Bump libcurl requirement to 7.15.5

The existence of the following functions is now guaranteed:
* curl_escape()
* curl_unescape()
* curl_multi_setopt()

libcurl 7.15.5 has been released 11.5 years ago and is available
even in RHEL 5.

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Bump libcurl requirement to 7.12.1

The existence of the following functions is now guaranteed:
* curl_reset()
* curl_strerror()
* curl_multi_strerror()
* curl_share_strer

Bump libcurl requirement to 7.12.1

The existence of the following functions is now guaranteed:
* curl_reset()
* curl_strerror()
* curl_multi_strerror()
* curl_share_strerror()

libcurl 7.12.1 has been released more than 13 years ago and is
available even in RHEL 4.

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Fixed bug #75614

Replace non-standard == with = in shell scripts.

Escape newline on curl config.m4

Fix LDFLAGS getting overwritten (ext/curl)

Improve pkg-config usage
- use default path when run using --with-curl=/usr (for debian)
- fallback to headers search when libcurl.pc not found
- issue warnings for explanation

Switch from curl-config to pkg-config for curl extension

First attemp to fix multiarch support (#74125) for curl
introduce some debian specificity (dpkg command)
so is not suitable f

Switch from curl-config to pkg-config for curl extension

First attemp to fix multiarch support (#74125) for curl
introduce some debian specificity (dpkg command)
so is not suitable for other environmant.

This is mostly related to a broken "curl-config" config on debian
which doesn't provide the correct build options, while pkg-config
works as expected.

This new attemp rely on pkg-config output instead.

Notice: this make pkg-config a hard dependency.
Is there system without pkg-config ?

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Fixed bug #75093 OpenSSL support not detected