To make it harder to do cross-protocol mistakes

Closes https://github.com/curl/curl/pull/1070

Fixes #1057

Closes #922

Closes #1066

There shouldn't be many devs out there anymore using such outdated macOS
versions. And it removes the dead link.

Closes #1049

5 more fixes, 2 more contributors

Not all reply messages were properly checked for their lengths, which
made it possible to access uninitialized memory (but this does not lead
to out of boundary accesses).

Closes #1052

128 arguments should be enough for everyone

... it no longer takes printf() arguments since it was only really taken
advantage by one user and it was not written and used in a safe
way. Thus the 'f' is removed from the function name and the proto is
changed.

Although the current code wouldn't end up in badness, it was a risk that
future changes could end up springf()ing too large data or passing in a
format string inadvertently.

The previous use of snprintf() could make libcurl silently truncate some
input data and not report that back on overly large input, which could
make data get sent over the network in a bad format.

Example:

 $ curl --form 'a=b' -H "Content-Type: $(perl -e 'print "A"x4100')"

The subdirectory for logs in tests/ is named log/ without an 's'
at the end.

See #1054

The 'userp' argument is unused in this example code.

The error path would previously add a freed entry to the linked list.

Reported-by: Toby Peterson

Fixes #1053

Cokie with the same domain but different tailmatching property are now
considered different and do not replace each other.  If header contains
following lines then two cookies will be set: Set-Cookie: foo=bar;
domain=.foo.com; expires=Thu Mar 3 GMT 8:56:27 2033 Set-Cookie: foo=baz;
domain=foo.com; expires=Thu Mar 3 GMT 8:56:27 2033

This matches Chrome, Opera, Safari, and Firefox behavior. When sending
stored tokens to foo.com Chrome, Opera, Firefox store send them in the
stored order, while Safari pre-sort the cookies.

Closes #1050

Type required for YourClass::func C++ function (using size_t in line
with the documentation for CURLOPT_WRITEFUNCTION) and missing second
colon when specifying the static function for CURLOPT_WRITEFUNCTION.

Closes #1046

A libssh2 library in the standard system location was being used in
preference to the desired one while linking.

Add the new option CURLOPT_KEEP_SENDING_ON_ERROR to control whether
sending the request body shall be completed when the server responds
early with an error status code.

This is suitable for manual NTLM authentication.

Reviewed-by: Jay Satiro

Closes https://github.com/curl/curl/pull/904

As it seems to be a rarely used cipher suite (for securely established
but _unencrypted_ connections), I believe it is fine not to provide an
alias for the misspelled variant.

.. and add that --proto-redir and CURLOPT_REDIR_PROTOCOLS do not
override protocols denied by --proto and CURLOPT_PROTOCOLS.

- Add a test to enforce: --proto deny must override --proto-redir allow

Closes https://github.com/curl/curl/pull/1031

Follow-up to 6140dfcf

Reported-by: Alexander Sinditskiy