tidy-up: indentation in autotools sources

Indentation in `configure.ac` and `.m4` files.

Closes #14692

configure: use AC_MSG_WARN for TLS/experimental warning texts

- no longer warns for mbedtls
- warns for each item on individual lines
- no longer shows irrelevant TLS libraries when

configure: use AC_MSG_WARN for TLS/experimental warning texts

- no longer warns for mbedtls
- warns for each item on individual lines
- no longer shows irrelevant TLS libraries when multiple are selected
- removes ech repetition

Closes #13941

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libcurl.pc: add `Requires.private`, `Requires` for static linking

- cmake: populate for dependencies.
- autotools: populate for dependencies.
(including mbedtls, though the script

libcurl.pc: add `Requires.private`, `Requires` for static linking

- cmake: populate for dependencies.
- autotools: populate for dependencies.
(including mbedtls, though the script does not detect
mbedtls through pkgconfig. mbedtls 3.6.0 now supports it.)

Skip dealing with gssapi in this patch.

Fixes #864
Closes #13911

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TLS: add support for ECH (Encrypted Client Hello)

An EXPERIMENTAL feature used with CURLOPT_ECH and --ech.

Closes #11922

NTLM_WB: drop support

The feature has not worked for months and has been marked as DEPRECATED
for six+ months.

Closes #13249

curl-confopts.m4: define CARES_NO_DEPRECATED when c-ares is used

Starting in 1.28.0 c-ares added deprecation warnings for some API calls
libcurl uses.

Closes #13240

misc: fix spelling mistakes

Reported-by: musvaage on github
Fixes #11171
Closes #11172

copyright: update all copyright lines and remove year ranges

- they are mostly pointless in all major jurisdictions
- many big corporations and projects already don't use them
- save

copyright: update all copyright lines and remove year ranges

- they are mostly pointless in all major jurisdictions
- many big corporations and projects already don't use them
- saves us from pointless churn
- git keeps history for us
- the year range is kept in COPYING

checksrc is updated to allow non-year using copyright statements

Closes #10205

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configure: require fork for NTLM-WB

Reported-by: ウさん

Fixes #9847
Closes #9856

autotools: allow --enable-symbol-hiding with windows

This local autotools logic was put in place in
9e24b9c7afbcb81120af4cf3f6cdee49a06d8224 (in 2012) which disabled it for
Windows u

autotools: allow --enable-symbol-hiding with windows

This local autotools logic was put in place in
9e24b9c7afbcb81120af4cf3f6cdee49a06d8224 (in 2012) which disabled it for
Windows unconditionally. Testing reveals that it actually works with
tested toolchains (mingw-w64 and CI ones), so let's allow this build
feature on that platform. Bringing this in sync with CMake, which already
supported this.

Reviewed-by: Jay Satiro

Closes #9586

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curl-confopts: remove leftover AC_REQUIREs

configure.ac:3488: warning: CURL_CHECK_FUNC_IOCTL is m4_require'd but not m4_defun'd
configure.ac:3488: warning: CURL_CHECK_FUNC_SETSOCKOPT is

curl-confopts: remove leftover AC_REQUIREs

configure.ac:3488: warning: CURL_CHECK_FUNC_IOCTL is m4_require'd but not m4_defun'd
configure.ac:3488: warning: CURL_CHECK_FUNC_SETSOCKOPT is m4_require'd but not m4_defun'd

follow-up from 4d73854462f30

Closes #9183

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copyright: make repository REUSE compliant

Add licensing and copyright information for all files in this repository. This
either happens in the file itself as a comment header or in the

copyright: make repository REUSE compliant

Add licensing and copyright information for all files in this repository. This
either happens in the file itself as a comment header or in the file
`.reuse/dep5`.

This commit also adds a Github workflow to check pull requests and adapts
copyright.pl to the changes.

Closes #8869

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configure: remove support for "embedded ares"

In March 2010 (commit 4259d2df7dd) we removed the embedded 'ares'
directory from the curl source tree but we have since supported
especi

configure: remove support for "embedded ares"

In March 2010 (commit 4259d2df7dd) we removed the embedded 'ares'
directory from the curl source tree but we have since supported
especially detecting and using that build directory. The time has come
to remove that kludge and ask users to specify the c-ares dir correctly
with --enable-ares.

Closes #8397

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curl-confopts.m4: remove --enable/disable-hidden-symbols

These configure options have been saying "deprecated" since 9e24b9c7af
(April 2012). It was about time we remove them.

curl-confopts.m4: remove --enable/disable-hidden-symbols

These configure options have been saying "deprecated" since 9e24b9c7af
(April 2012). It was about time we remove them.

Closes #7891

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configure: s/AC_HELP_STRING/AS_HELP_STRING

AC_HELP_STRING is deprecated in 2.70+ and I believe AS_HELP_STRING works
already since 2.59 so bump the minimum required version to that.

configure: s/AC_HELP_STRING/AS_HELP_STRING

AC_HELP_STRING is deprecated in 2.70+ and I believe AS_HELP_STRING works
already since 2.59 so bump the minimum required version to that.

Reported-by: Emil Engler
Fixes #6647
Closes #6748

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curl.se: new home

Closes #6172

ECH: renamed from ESNI in docs and configure

Encrypted Client Hello (ECH) is the current name.

Closes #6022

cleanup: fix typos and wording in docs and comments

Closes #4869
Reviewed-by: Emil Engler and Daniel Gustafsson

ESNI: initial build/setup

Closes #4011

configure: Fix typo in comment

whitespace fixes

- replace tabs with spaces where possible
- remove line ending spaces
- remove double/triple newlines at EOF
- fix a non-UTF-8 character
- cleanup a few inde

whitespace fixes

- replace tabs with spaces where possible
- remove line ending spaces
- remove double/triple newlines at EOF
- fix a non-UTF-8 character
- cleanup a few indentations/line continuations
in manual examples

Closes https://github.com/curl/curl/pull/3037

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curl-confopts.m4: fix typo from ed224f23d5beb

Fixes my local configure to detect a custom installed c-ares without
pkgconfig.

configure: use pkg-config for c-ares detection

First check if there's c-ares information given as pkg-config info and use
that as first preference.

Reported-by: pszemus on githu

configure: use pkg-config for c-ares detection

First check if there's c-ares information given as pkg-config info and use
that as first preference.

Reported-by: pszemus on github
Fixes #2203
Closes #2658

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configure: put CURLDEBUG and DEBUGBUILD in lib/curl_config.h

They are removed from the compiler flags.

This ensures that make dependency tracking will force a rebuild whenever
c

configure: put CURLDEBUG and DEBUGBUILD in lib/curl_config.h

They are removed from the compiler flags.

This ensures that make dependency tracking will force a rebuild whenever
configure --enable-debug or --enable-curldebug changes.

Closes #2548

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curl-confopts.m4: fix --disable-threaded-resolver

Closes https://github.com/curl/curl/issues/1784