Closes #2724

... and not the other way around, which this previously said.

Reported-by: Vasiliy Faronov
Fixes #2723
Closes #2726

When size_t is not a typedef for unsigned long (as usually the case on
Windows), GCC emits -Wformat warnings when using lu and lx format
specifiers with size_t. Silence them with explicit casts to
unsigned long.

Closes https://github.com/curl/curl/pull/2721

Closes #2706

Closes #2704

The code treated the set version as the *exact* version to require in
the TLS handshake, which is not what other TLS backends do and probably
not what most people expect either.

Reported-by: Andreas Olsson
Assisted-by: Gaurav Malhotra
Fixes #2691
Closes #2694

Reported-by: Andreas Olsson
Fixes #2692
Closes #2693

The previous example was a little bit confusing, because SSL* structure
(or other "in use" SSL connection pointer) is not accessible after the
transfer is completed, therefore working with the raw TLS library
specific pointer needs to be done during transfer.

Closes #2690

Follow-up to b6a16afa

Closes #2673

Closes #2663

Closes #2657

Closes #2120

Closes #2281

Implemented by Björn in 946ce5b6

Given the contstraints of SChannel, I'm exposing these as the algorithms
themselves instead; while replicating the ciphersuite as specified by
OpenSSL would have been preferable, I found no way in the SChannel API
to do so.

To use this from the commandline, you need to pass the names of contants
defining the desired algorithms. For example, curl --ciphers
"CALG_SHA1:CALG_RSA_SIGN:CALG_RSA_KEYX:CALG_AES_128:CALG_DH_EPHEM"
https://github.com The specific names come from wincrypt.h

Closes #2630

Detected using the `codespell` tool (version 1.13.0).

Also secure and fix an URL.

According to the user survey 2018, not even one out of 670 users use
them. Nobody on the mailing list spoke up for them either.

Closes #2629

If there's an existing entry using the selected name.

Closes #2622

Closes #2276

Adds CURLOPT_DISALLOW_USERNAME_IN_URL and --disallow-username-in-url. Makes
libcurl reject URLs with a username in them.

Closes #2340

Adds CURLOPT_TLS13_CIPHERS and CURLOPT_PROXY_TLS13_CIPHERS.

curl: added --tls13-ciphers and --proxy-tls13-ciphers

Fixes #2435
Reported-by: zzq1015 on github
Closes #2607

... the older description doesn't work

Reported-by: Peter Varga
Fixes #2615
Closes #2616