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

"PR-welcome" was the former name.

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

- When uploading via chunked-encoding don't compare file size to bytes
  sent to determine whether the upload has finished.

Chunked-encoding adds its own overhead which why the bytes sent is not
equal to the file size. Prior to this change if a file was uploaded in
chunked-encoding and its size was known it was possible that the upload
could end prematurely without sending the final few chunks. That would
result in a server hang waiting for the remaining data, likely followed
by a disconnect.

The scope of this bug is limited to some arbitrary file sizes which have
not been determined. One size that triggers the bug is 475020.

Bug: https://github.com/curl/curl/issues/2001


Reported-by:  <moohoorama@users.noreply.github.com>

Closes https://github.com/curl/curl/pull/2010

... by using curl_off_t for the typedef if time_t is larger than 4
bytes.

Reported-by: Gisle Vanem
Bug: https://github.com/curl/curl/commit/b9d25f9a6b3ca791385b80a6a3c3fa5ae113e1e0#co
mmitcomment-25205058
Closes #2019

... instead of doing an infinite loop!

Added test 1162 to verify.

Reported-by: Max Dymond
Fixes #2015
Closes #2017

Fixes timeouts in the fuzzing tests for non-FTP protocols.

Closes #2016

Allow users to specify their own hash define for
CURL_CONNECTION_HASH_SIZE so that both values can be overridden.

Closes #1982

... since the 'tv' stood for timeval and this function does not return a
timeval struct anymore.

Also, cleaned up the Curl_timediff*() functions to avoid typecasts and
clean up the descriptive comments.

Closes #2011

When using the FTP list parser, ensure that the memory that's
allocated is always freed.

Detected by OSS-fuzz: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=3682
Closes #2013

... to cater for systems with unsigned time_t variables.

- Renamed the functions to curlx_timediff and Curl_timediff_us.

- Added overflow protection for both of them in either direction for
  both 32 bit and 64 bit time_ts

- Reprefixed the curlx_time functions to use Curl_*

Reported-by: Peter Piekarski
Fixes #2004
Closes #2005

They use $(TESTUTIL) and thus should use $(TESTUTIL_LIBS) too.

This fixes build failures on Fedora 13.

Closes #2006

closes #2008

We don't expect any steps to fail in travis. Exit the script if they do.

Closes #1966

Aurora is no longer used by Mozilla
https://hacks.mozilla.org/2017/04/simplifying-firefox-release-channels/

The 'tip' is the most recent branch committed to, this should be
'default' like the URLs for the browser are.

Closes #1998

CVE-2017-1000257

Reported-by: Brian Carpenter and 0xd34db347
Also detected by OSS-Fuzz: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=3586

... by using range checks. Among other things, this avoids an undefined
behavior for a left shift that could happen on negative or very large
values.

Closes #1997

Detected by OSS-fuzz: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=3694

See issue #1999

The contents might have changed: size must be recomputed.

Reported-by: moteus on github
Fixes #1999

Even if OpenSSL is enabled, it might not be the default backend when
multi-ssl is enabled, causing the test to fail.

On OS/400, `close' is an ASCII system macro that corrupts the code if
not used in a context not targetting the close() system API.

Also adjust makefile to renamed files and warn about installation dirs mix-up.

... filter early instead of risking "funny values" having to be dealt
with elsewhere.

... that are multiplied by 1000 when stored.

For 32 bit long systems, the max value accepted (2147483 seconds) is >
596 hours which is unlikely to ever be set by a legitimate application -
and previously it didn't work either, it just caused undefined behavior.

Also updated the man pages for these timeout options to mention the
return code.

Closes #1938

Allow to ovverride certain build tools, making it possible to
use LLVM/Clang to build curl. The default behavior is unchanged.
To build with clang (as offered by MSYS2), these settings can
be used:

CURL_CC=clang
CURL_AR=llvm-ar
CURL_RANLIB=llvm-ranlib

Closes https://github.com/curl/curl/pull/1993

Use memset() to initialize a structure to avoid LLVM/Clang warning:
ldap.c:193:39: warning: missing field 'UserLength' initializer [-Wmissing-field-initializers]

Closes https://github.com/curl/curl/pull/1992