curl must be built before building the tests.

Closes https://github.com/curl/curl/pull/1352

Send curl_socket_t to event_cb and make sure it hasn't been closed yet.

Closes https://github.com/curl/curl/pull/1318

- If SSL_get_error is called but no extended error detail is available
  then show that SSL_ERROR_* as a string.

Prior to this change there was some inconsistency in that case: the
SSL_ERROR_* code may or may not have been shown, or may have been shown
as unknown even if it was known.

Ref: https://github.com/curl/curl/issues/1300

Closes https://github.com/curl/curl/pull/1348

This is nowadays included with the base perl distribution, but wasn't
prior to about perl 5.14

Signed-off-by: Anders Roxell <anders.roxell@gmail.com>

Closes #1342

Running this in the root build dir will invoke the test suite to only
run tests not marked as 'flaky'.

Ref: https://curl.haxx.se/mail/lib-2017-02/0097.html

Closes https://github.com/curl/curl/pull/1272

Note that for some reason there is this warning (that also exists with
autotools, added since curl-7_15_1-94-ga718cb05):

    docs/libcurl/curl_multi_socket_all.3:1: can't open `man3/curl_multi_socket.3': No such file or directory

Additionally, adjust the roffit --mandir option to support creating
links when doing out-of-tree builds.

Ref: https://github.com/curl/curl/pull/1288

Also make Perl mandatory to allow building the docs.

While CMakeLists.txt could probably read the list of manual pages from
Makefile.am, actually putting those in CMakeLists.txt is cleaner so that
is what is done here.

Fixes #1230
Ref: https://github.com/curl/curl/pull/1288

For easier sharing with CMake. The contents were reformatted to use
two-space indent and expanded tabs (matching lib/Makefile.common).

Ref: https://github.com/curl/curl/pull/1288

The code would refer to the wrong data pointer. Only debug builds do
this - for verbosity.

Reported-by:  <zelinchen@users.noreply.github.com>
Fixes #1329

These tests use an HTTP proxy so require that curl be built with HTTP
support.

The CURLOPT_USERAGENT and CURLOPT_MAXREDIRS options are only set if HTTP
support is available, so ignore them in tests where HTTP is not
guaranteed.

Broken a week ago in 6448f98c.

Closes https://github.com/curl/curl/pull/1337

- Show the HTTPS-proxy options on CURLE_SSL_CACERT if libcurl was built
  with HTTPS-proxy support.

Prior to this change those options were shown only if an HTTPS-proxy was
specified by --proxy, but that did not take into account environment
variables such as http_proxy, https_proxy, etc. Follow-up to e1187c42.

Bug: https://github.com/curl/curl/issues/1331
Reported-by: Nehal J Wani

... as we no longer use libidn

... by removing the else branch after a return, break or continue.

Closes #1310

- Auto-detect OpenSSL 1.1 libs

Closes https://github.com/curl/curl/pull/1322

... previously, docs/ was only a dist subdir, now also a build subdir.

Reported-by: Dan Fandrich
Bug: https://curl.haxx.se/mail/lib-2017-03/0017.html

Depend on the known behaviour of URLs for nonexistent files rather than
the undefined behaviour of URLs for directories (which fails on Windows).
The test isn't about file: URLs at all, so the URL used doesn't really
matter.

Otherwise, the contents will end up in the output and fail the
verification.

If a % ended the statement, the string's trailing NUL would be skipped
and memory past the end of the buffer would be accessed and potentially
displayed as part of the --write-out output. Added tests 1440 and 1441
to check for this kind of condition.

Reported-by: Brian Carpenter