Fixes #2079
Closes #2081

Follow-up to aadb7c7b. Verified by new test 1263.

Closes #2072

There is a conflict on symbol 'free_func' between openssl/crypto.h and
zlib.h on AIX. This is an attempt to resolve it.

Bug: https://curl.haxx.se/mail/lib-2017-11/0032.html
Reported-By: Michael Felt

Reported-by: Brian Carpenter

Closes #2071

... to make url.c smaller.

Closes #1944

CID 984459, detected by Coverity

The --interface command (CURLOPT_INTERFACE option) already uses
SO_BINDTODEVICE on Linux, but it tries to parse it as an interface or IP
address first, which fails in case the user passes a VRF.

Try to use the socket option immediately and parse it as a fallback
instead.  Update the documentation to mention this feature, and that it
requires the binary to be ran by root or with CAP_NET_RAW capabilities
for this to work.

Closes #2024

As documented in RFC 3501 section 9:
https://tools.ietf.org/html/rfc3501#section-9

Closes #2061

... previously it would store it already in the happy eyeballs stage
which could lead to the IPv6 bit being set for an IPv4 connection,
leading to curl not wanting to do EPSV=>PASV for FTP transfers.

Closes #2053

- Don't call zlib's inflate() when avail_in stream bytes is 0.

This is a follow up to the parent commit 19e66e53. Prior to that change
libcurl's inflate_stream could call zlib's inflate even when no bytes
were available, causing inflate to return Z_BUF_ERROR, and then
inflate_stream would treat that as a hard error and return
CURLE_BAD_CONTENT_ENCODING.

According to the zlib FAQ, Z_BUF_ERROR is not fatal.

This bug would happen randomly since packet sizes are arbitrary. A test
of 10,000 transfers had 55 fail (ie 0.55%).

Ref: https://zlib.net/zlib_faq.html#faq05

Closes https://github.com/curl/curl/pull/2060

There was a duplicate check for backslashes in the setcharset()
function.

Coverity CID 1420611

Since 'conn' won't be NULL in there and we also access the pointer in
there without the check.

Coverity CID 1420610

It adds the ability to link against static brotli libs.

Also fix brotli include path.

This uses the brotli external library (https://github.com/google/brotli).
Brotli becomes a feature: additional curl_version_info() bit and
structure fields are provided for it and CURLVERSION_NOW bumped.

Tests 314 and 315 check Brotli content unencoding with correct and
erroneous data.

Some tests are updated to accomodate with the now configuration dependent
parameters of the Accept-Encoding header.

This is implemented as an output streaming stack of unencoders, the last
calling the client write procedure.

New test 230 checks this feature.

Bug: https://github.com/curl/curl/pull/2002
Reported-By: Daniel Bankhead

Since CURLSSH_AUTH_ANY (aka CURLSSH_AUTH_DEFAULT) is ~0 an arg value
check on this option is incorrect; we have to accept any value.

Prior to this change since f121575c (7.56.1+) CURLOPT_SSH_AUTH_TYPES
erroneously rejected CURLSSH_AUTH_ANY with CURLE_BAD_FUNCTION_ARGUMENT.

Bug: https://github.com/curl/curl/commit/f121575#commitcomment-25347120

It triggers an assert() when built with memdebug since malloc(0) may
return NULL *or* a valid pointer.

Detected by OSS-Fuzz: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=4054

Assisted-by: Max Dymond
Closes #2054

Regression since f121575c

Reported-by: Petr Voytsik
Fixes #2047

Prior to this change since f121575c (7.56.1+) CURLOPT_DNS_CACHE_TIMEOUT
erroneously rejected -1 with CURLE_BAD_FUNCTION_ARGUMENT.

This caused the torture tests on test 1800 to fail.

... which is valid according to documentation. Regression since
f121575c.

Verified now in test 501.

Reported-by: cbartl on github
Fixes #2038
Closes #2039

.. also add same arg value check to CURLOPT_POSTFIELDSIZE_LARGE.

Prior to this change since f121575c (7.56.1+) CURLOPT_POSTFIELDSIZE
erroneously rejected -1 value with CURLE_BAD_FUNCTION_ARGUMENT.

Bug: https://curl.haxx.se/mail/lib-2017-11/0000.html
Reported-by: Andrew Lambert

... when expiring old cookies.

Reported-by: Pavel Gushchin
Fixes #2032
Closes #2035

This avoids build errors and warnings caused by implicit casts.

Closes https://github.com/curl/curl/pull/2031

Pointed-out-by: Dmitri Tikhonov
Bug: #2034

s/curlx_tvnow/Curl_now

If clock_gettime() is not supported, use mach_absolute_time() on MacOS.

closes #2033

The config files define curl and libcurl targets as imported targets
CURL::curl and CURL::libcurl. For backward compatibility with CMake-
provided find-module the CURL_INCLUDE_DIRS and CURL_LIBRARIES are
also set.

Closes #1879

Signed-off-by: Florin <petriuc.florin@gmail.com>

returning 'time_t' is problematic when that type is unsigned and we
return values less than zero to signal "already expired", used in
several places in the code.

Closes #2021

Regression since f121575c

Reported-by: Rob Cotrone

This avoids warnings about unused stuff.

Closes https://github.com/curl/curl/pull/2023

If WINAPI_FAMILY is defined, it should be safe to try to include
winapifamily.h to check what the define evaluates to.

This should fix detection of CURL_WINDOWS_APP if building with
_WIN32_WINNT set to 0x0600.

Closes #2025