docs: fix proselint complaints

NPN: remove support for and use of

Next Protocol Negotiation is a TLS extension that was created and used
for agreeing to use the SPDY protocol (the precursor to HTTP/2) for
HTTPS. I

NPN: remove support for and use of

Next Protocol Negotiation is a TLS extension that was created and used
for agreeing to use the SPDY protocol (the precursor to HTTP/2) for
HTTPS. In the early days of HTTP/2, before the spec was finalized and
shipped, the protocol could be enabled using this extension with some
servers.

curl supports the NPN extension with some TLS backends since then, with
a command line option `--npn` and in libcurl with
`CURLOPT_SSL_ENABLE_NPN`.

HTTP/2 proper is made to use the ALPN (Application-Layer Protocol
Negotiation) extension and the NPN extension has no purposes
anymore. The HTTP/2 spec was published in May 2015.

Today, use of NPN in the wild should be extremely rare and most likely
totally extinct. Chrome removed NPN support in Chrome 51, shipped in
June 2016. Removed in Firefox 53, April 2017.

Closes #9307

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DEPRECATE.md: push the NSS deprecation date forward one year to 2023

URL: https://curl.se/mail/lib-2022-08/0016.html

docs: lots of minor language polish

Mostly based on recent language decisions from "everything curl":

- remove contractions (isn't => is not)
- *an* HTTP (consistency)
- run

docs: lots of minor language polish

Mostly based on recent language decisions from "everything curl":

- remove contractions (isn't => is not)
- *an* HTTP (consistency)
- runtime (no hyphen)
- backend (no hyphen)
- URL is uppercase

Closes #8646

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docs/DEPRECATE: remove NPN support in August 2022

Closes #8458

configure: requires --with-nss-deprecated to build with NSS

Add deprecation plans to docs/DEPRECATE.md

Closes #8395

docs: reduce/avoid English contractions

You're => You are
Hasn't => Has not
Doesn't => Does not
Don't => Do not
You'll => You will
etc

Closes #7930

mailing lists: move from cool.haxx.se to lists.haxx.se

DEPRECATE.md: linkify curl-library mailing list

Closes #7561

docs: correct spelling errors and a broken link

Update grammar and spelling in docs and source code comments.

Closes: #7427
Reviewed-by: Daniel Stenberg <daniel@haxx.se>

polarssl: removed

As detailed in DEPRECATE.md, the polarssl support is now removed after
having been disabled for 6 months and nobody has missed it.

The threadlock files used by

polarssl: removed

As detailed in DEPRECATE.md, the polarssl support is now removed after
having been disabled for 6 months and nobody has missed it.

The threadlock files used by mbedtls are renamed to an 'mbedtls' prefix
instead of the former 'polarssl' and the common functions that
previously were shared between mbedtls and polarssl and contained the
name 'polarssl' have now all been renamed to instead say 'mbedtls'.

Closes #4825

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http09: disable HTTP/0.9 by default in both tool and library

As the plan has been laid out in DEPRECATED. Update docs accordingly and
verify in test 1174. Now requires the option to be s

http09: disable HTTP/0.9 by default in both tool and library

As the plan has been laid out in DEPRECATED. Update docs accordingly and
verify in test 1174. Now requires the option to be set to allow HTTP/0.9
responses.

Closes #4191

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DEPRECATE: fixup versions and spelling

Correctly set the July 17 version to 7.65.2, and update spelling to
be consistent. Also fix a typo.

Closes https://github.com/curl/curl/pu

DEPRECATE: fixup versions and spelling

Correctly set the July 17 version to 7.65.2, and update spelling to
be consistent. Also fix a typo.

Closes https://github.com/curl/curl/pull/4107

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PolarSSL: deprecate support step 1. Removed from configure.

Also removed mentions from most docs.

Discussed: https://curl.haxx.se/mail/lib-2019-05/0045.html

Closes #3888

CURLOPT_DNS_USE_GLOBAL_CACHE: remove

Remove the code too. The functionality has been disabled in code since
7.62.0. Setting this option will from now on simply be ignored and have
no

CURLOPT_DNS_USE_GLOBAL_CACHE: remove

Remove the code too. The functionality has been disabled in code since
7.62.0. Setting this option will from now on simply be ignored and have
no function.

Closes #3654

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pipelining: removed

As previously planned and documented in DEPRECATE.md, all pipelining
code is removed.

Closes #3651

http: added options for allowing HTTP/0.9 responses

Added CURLOPT_HTTP09_ALLOWED and --http0.9 for this purpose.

For now, both the tool and library allow HTTP/0.9 by default.
do

http: added options for allowing HTTP/0.9 responses

Added CURLOPT_HTTP09_ALLOWED and --http0.9 for this purpose.

For now, both the tool and library allow HTTP/0.9 by default.
docs/DEPRECATE.md lays out the plan for when to reverse that default: 6
months after the 7.64.0 release. The options are added already now so
that applications/scripts can start using them already now.

Fixes #2873
Closes #3383

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axtls: removed

As has been outlined in the DEPRECATE.md document, the axTLS code has
been disabled for 6 months and is hereby removed.

Use a better supported TLS library!

axtls: removed

As has been outlined in the DEPRECATE.md document, the axTLS code has
been disabled for 6 months and is hereby removed.

Use a better supported TLS library!

Assisted-by: Daniel Gustafsson
Closes #3194

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docs/DEPRECATE: minor reformat to render nicer on web

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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CURLOPT_DNS_USE_GLOBAL_CACHE: deprecated

Disable the CURLOPT_DNS_USE_GLOBAL_CACHE option and mark it for
deprecation and complete removal in six months.

Bug: https://curl.haxx.s

CURLOPT_DNS_USE_GLOBAL_CACHE: deprecated

Disable the CURLOPT_DNS_USE_GLOBAL_CACHE option and mark it for
deprecation and complete removal in six months.

Bug: https://curl.haxx.se/mail/lib-2018-09/0010.html
Closes #2942

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DEPRECATE: remove release date from 7.62.0

Since it will slip and the version is the important part there, not the
date.

DEPRECATE: include year when specifying date

DEPRECATE: linkified

DEPRECATE: mention the PR that disabled axTLS