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

Closes #3197

MesaLink support was added in commit 57348eb9

 but the
backend was never added to the curl_sslbackend enum in curl/curl.h.
This adds the new backend to the enum and updates the relevant docs.

Closes #3195
Reviewed-by: Daniel Stenberg <daniel@haxx.se>

See: https://curl.haxx.se/mail/lib-2018-10/0107.html

... picked straight from the OpenSSL man page:
https://www.openssl.org/docs/manmaster/man3/SSL_CTX_set_ciphersuites.html

Reported-by: Ricky-Tigg on github
Bug: #3178

... I'm moving it up one week due to travels. The rest stays.

Fixes #3171
Closes #3172

Closes https://github.com/curl/curl/pull/3159

Retract the previous approach as the sponsors will be the ones to set the
final amounts.

Closes #3152
[ci skip]

... now there's only BountyGraph.

Commit 57348eb9

 added support for the
MesaLink vtls backend, but missed updating the TLS section containing
supported backends in the docs.

Closes #3134
Reviewed-by: Daniel Stenberg <daniel@haxx.se>

Ref: https://rawgit.com/ "RawGit has reached the end of its useful life"
Ref: https://news.ycombinator.com/item?id=18202481
Closes https://github.com/curl/curl/pull/3131

[ci skip]

- link TLS 1.2 and TLS 1.3 options
- link proxy and non-proxy options

Closes #3121

Changes s/OSCP/OCSP/ and bumps the copyright year due to the change.

Closes #3112
Reviewed-by: Daniel Stenberg <daniel@haxx.se>

as detected by codespell 1.14.0

Closes https://github.com/curl/curl/pull/3114


Reviewed-by: Marcel Raad <Marcel.Raad@teamviewer.com>

Bug bounty explainer. See https://bountygraph.com/programs/curl

Closes #3067

Add DYLD_INSERT_LIBRARIES support to the TODO list. Reported in #2394.

The parameter reference <string> was causing rendering issues in the
generated HTML page, as <string> isn't a valid HTML tag. Fix by back-
tick escaping it.

Closes #3099
Reviewed-by: Jay Satiro <raysatiro@yahoo.com>
Reviewed-by: Daniel Stenberg <daniel@haxx.se>

Use TLS vX.Y throughout the document, instead of TLS X.Y, as that was
already done in all but a few cases. Also fix a few typos.

Closes #3076
Reviewed-by: Marcel Raad <Marcel.Raad@teamviewer.com>
Reviewed-by: Daniel Stenberg <daniel@haxx.se>

Use proper Markdown hyperlink format for the Bountygraph links in order
for the generated website page to be more user friendly. Also link to
the sponsors to give them a little extra credit.

Closes #3082
Reviewed-by: Daniel Stenberg <daniel@haxx.se>

- Advise user that --data-binary sends a default content type of
  x-www-form-urlencoded, and to have the data treated as arbitrary
  binary data by the server set the content-type header to octet-stream.

Ref: https://github.com/curl/curl/pull/2852#issuecomment-426465094

Closes https://github.com/curl/curl/pull/3085

Bug: #3077

Noticed a typo reading through the docs.

Closes #3069

Closes #3050

- and one in docs/MANUAL as well

Closes https://github.com/curl/curl/pull/3038

- 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

- also update two URLs outside of docs/examples
- fix spelling of filename persistant.c
- fix three long lines that started failing checksrc.pl

Closes https://github.com/curl/curl/pull/3036

also:
- fix two warnings in synctime.c (one of them Windows-specific)
- upgrade URLs in synctime.c and remove a broken one

Closes https://github.com/curl/curl/pull/3033

Closes #3030

Closes #3032

Closes https://github.com/curl/curl/pull/3031

Removed DoH.

Closes #2734