Follow up on https://github.com/curl/curl/pull/2472.
Now using en-us instead of nl-nl as language code in the URL.

Closes https://github.com/curl/curl/pull/2475

The setenv command no longer exists and visual studio build prompts got
changed. Used Visual Studio 2015/2017 as reference.

Closes #2472

unit1309 and vtls/gtls: error: arithmetic on a null pointer treated as a
cast from integer to pointer is a GNU extension

Reported-by: Rikard Falkeborn

Fixes #2466
Closes #2468

- Use _fseeki64 instead of fseek (long) to seek curl_off_t in Windows.

- Use CURL_FORMAT_CURL_OFF_T specifier instead of %ld to print
  curl_off_t.

Caught by Marc's CI builds.

... and use this type instead of 'sa_family_t' in the code since several
platforms don't have it.

Closes #2463

Only treat response code as FTP response codes in case the
protocol type is FTP.

This fixes an issue where an HTTP download was treated as FTP
in case libcurl returned with 33. This happens when the
download has already finished and the server responses 416:
  HTTP/1.1 416 Requested Range Not Satisfiable

This should not be treated as an FTP error.

Fixes #2464
Closes #2465

... since they return size_t anyway!

closes #2462

.. and do the same for build-wolfssl.bat.

Because MS calls it VC14.1.

Closes https://github.com/curl/curl/pull/2189

Due to the check in Makefile.vc and MakefileBuild.vc, no make call can
be invoked unless a build-type was specified. However, a clean target
only existed when a build type was specified. As a result, the clean
target was unreachable. Made clean target unconditional.

Closes #2455

Fixes #2430
Closes #2457

In the situation of a client connecting to an FTP server using an IPv6
tunnel proxy, the connection info will indicate that the connection is
IPv6. However, because the server behing the proxy is IPv4, it is
permissable to attempt PSV mode. In the case of the FTP server being
IPv4 only, EPSV will always fail, and with the current logic curl will
be unable to connect to the server, as the IPv6 fwdproxy causes curl to
think that EPSV is impossible.

Closes #2432

curl 7.57.0 and up interpret this according to Appendix E.3.2 of RFC
8089 but then returns an error saying this is unimplemented. This is
actually a regression in behavior on both Windows and Unix.

Before curl 7.57.0 this URL was treated as a path of "//foo/bar" and
then passed to the relevant OS API. This means that the behavior of this
case is actually OS dependent.

The Unix path resolution rules say that the OS must handle swallowing
the extra "/" and so this path is the same as "/foo/bar"

The Windows path resolution rules say that this is a UNC path and
automatically handles the SMB access for the program. So curl on Windows
was already doing Appendix E.3.2 without any special code in curl.

Regression

Closes #2438

This reverts commit dc854377.

libcurl (with the OpenSSL backend) performs server certificate verification
even if verifypeer == 0 and the verification result is available using
CURLINFO_SSL_VERIFYRESULT. The commit that is being reverted caused the
CURLINFO_SSL_VERIFYRESULT to not have useful information for the
verifypeer == 0 use case (it would always have
X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY).

Closes #2451

(mbedtls 2.70 compiled with MBEDTLS_DEPRECATED_REMOVED)

Closes #2453

closes #2458

This fixes a segfault occurring when a name of the (invalid) form "domain..tld"
is processed.

test46 updated to cover this case.

Follow-up to commit c990eadd.

Ref: https://github.com/curl/curl/pull/2440

... as OpenSSL >= 1.1.0 and libressl >= 2.7.0 use different argument types.

 - LibreSSL 2.7 implements (most of) OpenSSL 1.1 API

Fixes #2319
Closes #2447
Closes #2448

Signed-off-by: Bernard Spil <brnrd@FreeBSD.org>

This makes libcurl handle thousands of cookies much better and speedier.

Closes #2440

This drops the cookie load time for 8k cookies from 178ms to 15ms.

Closes #2441

...as otherwise it might use a different decimal sign.

Bug: #2436
Reported-by: Oumph on github

- Put a percent sign before each CURL_FORMAT_CURL_OFF_T in printf.

For example "%" CURL_FORMAT_CURL_OFF_T becomes %lld or similar.

Bug: https://curl.haxx.se/mail/lib-2018-03/0140.html
Reported-by: David L.

ARM targets need advapi32 explicitly.

Closes #2363

This is a workaround for an unsolved travis issue that is causing CI
instances to sporadically fail due to 'unable to connect' issues during
apt stage.

Ref: https://github.com/travis-ci/travis-ci/issues/8507
Ref: https://github.com/travis-ci/travis-ci/issues/9112#issuecomment-376305909

follow-up to a9a7b606

Closes #2428

In order to make curl_multi_timeout() return suitable "sleep" times even
when there's no socket to wait for while the name is being resolved in a
helper thread.

It will increases the timeouts as time passes.

Closes #2419

Closes #2399

- Move the CURL_WERROR option processing after the configuration checks
  to avoid failures in case of warnings during the configuration checks.

This is a partial fix for #2358

This is fixes #2358

If a connection has received a GOAWAY frame while not being used, the
function now reads frames off the connection before trying to reuse it
to avoid reusing connections the server has told us not to use.

Reported-by: Alex Baines
Fixes #1967
Closes #2402

Closes #2414

Reported-by: Michal Trybus

Fixes #2400

Closes #2317