To verify a proxy's public key. For when using HTTPS proxies.

Fixes #2192
Closes #2268

The logic tries to figure out what the path separator in the $PATH
variable is, but if there's only one directory in the $PATH it
fails. This change make configure *guess* on colon instead of erroring
out, simply because that is probably the more common character.

PATH_SEPARATOR can always be set by the user to override the guessing.

(tricky bug to reproduce, as in my case for example the configure script
requires binaries in more than one directory so passing in a PATH with a
single dir fails.)

Reported-by: Earnestly on github
Fixes #2202
Closes #2265

... since the libc provided one are locale dependent in a way we don't
want. Also, the "native" isalnum() (for example) works differently on
different platforms which caused test 1307 failures on macos only.

Closes #2269

Previously, they were opened with Visual Studio 2015 by default, which
cannot build them.

Closes #1888

Closes #1809

Closes https://github.com/curl/curl/pull/2266

If CURL_DOES_CONVERSION is enabled, uploaded LFs are mapped to CRLFs,
giving a result that is different from what is expected.
This commit avoids using CURLOPT_TRANSFERTEXT and directly encodes data
to upload in ascii.

Bug: https://github.com/curl/curl/pull/1872

... with clang on macos

Data mismatch caused test 545 to fail when character encoding
conversion is enabled.

Bug: https://github.com/curl/curl/pull/1872

inadvertently removed in 283babfa

Closes #2263

Closes #2085

Assign the time_t variable negative value and then check if it is
greater than zero, which will evaluate true for unsigned time_t but
false for signed time_t.

Make curl_getdate() handle dates before 1970 as well (returning negative
values).

Make test 517 test dates for 64 bit time_t.

This fixes bug (3) mentioned in #2238

Closes #2250

Here is a version that should work with all versions of openssl 0.9.7
through 1.1.0.

Links to the docs:
https://www.openssl.org/docs/man1.0.2/crypto/EVP_DigestInit.html
https://www.openssl.org/docs/man1.1.0/crypto/EVP_DigestInit.html

At the very bottom of the 1.1.0 documentation there is a history section
that states, " stack allocated EVP_MD_CTXs are no longer supported."

If EVP_MD_CTX_create and EVP_MD_CTX_destroy are not defined, then a
simple mapping can be used as described here:
https://wiki.openssl.org/index.php/Talk:OpenSSL_1.1.0_Changes

Closes #2258

Closes #1429

It was once used for some debugging/verifying logic but should never have
ended up in git!

An idea that popped up in discussions on twitter.

Reported-By: Gisle Vanem
Bug: https://github.com/curl/curl/commit/993dd5651a6c853bfe3870f6a69c7b329fa4e8ce#commitcomment-27070080

djgpp do have 'mkdir(dir, mode)'. Other DOS-compilers does not 
But djgpp seems the only choice for MSDOS anyway.

PellesC do have a 'F_OK' defined in it's <unistd.h>.

Update year in Copyright.

Bug: https://curl.haxx.se/mail/lib-2018-01/0087.html
Reported-by: John Hascall

Closes #2257

... unless CURLOPT_UNRESTRICTED_AUTH is set to allow them. This matches how
curl already handles Authorization headers created internally.

Note: this changes behavior slightly, for the sake of reducing mistakes.

Added test 317 and 318 to verify.

Reported-by: Craig de Stigter
Bug: https://curl.haxx.se/docs/adv_2018-b3bf.html

Get screen width from the environment variable COLUMNS first, if set. If
not, use ioctl(). If nether works, assume 79.

Closes #2242

The "refresh" is for the -# output when no total transfer size is
known. It will now only use a single updated line even for this case:

The "-=O=-" ship moves when data is transferred. The four flying
"hashes" move (on a sine wave) on each refresh, independent of data.

Fixes #2237
Closes #2249

vtls.c:multissl_init() might do a curl_free() call so strip that out to
make this work with more builds. We just want to verify that
memorytracking works so skipping one line is no harm.

Reported-by: XhstormR on github
Fixes #2245

In case an identity didn't match[0], the state machine would fail in
state SSH_AUTH_AGENT instead of progressing to the next identity in
ssh-agent. As a result, ssh-agent authentication only worked if the
identity required happened to be the first added to ssh-agent.

This was introduced as part of commit c4eb10e2, which
stated that the "else" statement was required to prevent getting stuck
in state SSH_AUTH_AGENT. Given the state machine's logic and libssh2's
interface I couldn't see how this could happen or reproduce it and I
also couldn't find a more detailed description of the problem which
would explain a test case to reproduce the problem this was supposed to
fix.

[0] libssh2_agent_userauth returning LIBSSH2_ERROR_AUTHENTICATION_FAILED

Closes #2248

Coverity CID 1427646.