Closes #1461

This is for symmetry with the autoconf generated curl_config.h.in

Pass the invalid domain name on stdin. On some systems, the test
framework cannot pass invalid UTF-8 sequences on the command line.

Closes #1488

... as otherwise it risks not cleaning up the libssh2 handle properly
which leads to memory leak!

Assisted-by: Joel Depooter

Closes #1495
Closes #1479

Bug: https://curl.haxx.se/mail/lib-2017-04/0024.html

It takes someone to read up on the APIs of these libraries to figure out
how to do this correctly.

Reported-by: Michael Kaufmann

Closes #1253

That means delete the timer.

Reported-by: Michael Kaufmann
Ref: #1253

Since the man page generator wants the long option name version to
generate the proper output.

... as part of hugehelpgz rodata to make build reproducible.

See https://reproducible-builds.org/ for why this is good

Closes #1490

if no error was raised by the API but the SecIdentityRef was null

Fixes #1450

Reported-by: wyattoday at github
Fixes #1487

Closes #1400

follow-up to 5ddad099

... and support and additional "security patched" date for those who
enhance older versions that way. Pass on the define CURL_PATCHSTAMP with
a date for that.

Building with non-release headers shows the date as [unreleased].

Also: this changes the date format generated in the curlver.h file to be
"YYYY-MM-DD" (no name of the day or month, no time, no time zone) to
make it easier on the eye and easier to parse. Example (new) date
string: 2017-05-09

Suggested-by: Brian Childs

Closes #1474

Some code (e.g. Curl_fillreadbuffer) assumes that this buffer is not
exceedingly tiny and will break if it is. This same check is already
done at run time in the CURLOPT_BUFFERSIZE option.

... I found them in the commit logs from the early years

Also removed a TODO suggesting caching the precheck results. Tests
showed this would save about 0.1 sec on the total test run time on a
relatively modern system, an unnoticeable gain at the cost of longer and
more complicated code. There would also be a danger that a cached test
result would be inappropriately returned, such as when other test
dependencies (like environment variables) are different or when the
precheck causes side effects (like filesystem changes).

... and delete trailing whitespace

Fixes #1484

The function IsPipeliningPossible() would return TRUE if either
pipelining OR HTTP/2 were possible on a connection, which would lead to
it returning TRUE even for POSTs on HTTP/1 connections.

It now returns a bitmask so that the caller can differentiate which kind
the connection allows.

Fixes #1481
Closes #1483
Reported-by: stootill at github

Tested with servers: IIS 7.5; OpenSSL 1.0.2.

Closes https://github.com/curl/curl/pull/1475

clang 5.0 complains:
possible misuse of comma operator here [-Wcomma]

clang 5.0 complains:
possible misuse of comma operator here [-Wcomma]

Change the comma to a semicolon to fix that.

... since the total amount is low this is faster, easier and reduces
memory overhead.

Also, Curl_expire_done() can now mark an expire timeout as done so that
it never times out.

Closes #1472

 A) reduces the timeout lists drastically

 B) prevents a lot of superfluous loops for timers that expires "in vain"
    when it has actually already been extended to fire later on

@MarcelRaad noted that `test1399` causes infinite loop on MinGW.
Looking into this, seems like it is related to how Windows handles
CRLF. See https://github.com/curl/curl/commit/9e093f by @mback2k.
Removing `test1399` as it's identical to `test1326` then with such a
fix.

Test 1399 was broughy by commit 862b02f8

Closes #1478

Include the test number in the names of files written out by tests to
reduce the chance of accidental duplication and to make it more clear
which test is associated with which file.

This is already added by the test suite; it's not clear why all these
tests had it, unless it's cargo-culting.

Avoid casting away low-level const.

... to really make sure the boundary fits in the target buffer.

Fixes unused parameter 'buflen' warning.

Reported-by: Michael Kaufmann
Bug: https://github.com/curl/curl/pull/1468#issuecomment-300078754