Curl and libcurl 7.50.0

 Public curl releases:         156
 Command line options:         185
 curl_easy_setopt() options:   224
 Public functions in libcurl:  61
 Contributors:                 1404

This release includes the following changes:

 o http: add CURLINFO_HTTP_VERSION and %{http_version} [3]

This release includes the following bugfixes:

 o memdebug: fix MSVC crash with -DMEMDEBUG_LOG_SYNC [1]
 o openssl: fix build with OPENSSL_NO_COMP [2]
 o mbedtls: removed unused variables [4]
 o cmake: Added missing mbedTLS support [5]
 o URL parser: allow URLs to use one, two or three slashes [6]
 o curl: fix -q [regression] [7]
 o openssl: Use correct buffer sizes for error messages [8]
 o curl: fix SIGSEGV while parsing URL with too many globs [9]
 o schannel: add CURLOPT_CERTINFO support [10]
 o vtls: fix ssl session cache race condition [11]
 o http: Fix HTTP/2 connection reuse [regression] [12]
 o checksrc: Add LoadLibrary to the banned functions list
 o schannel: Disable ALPN on Windows < 8.1 [13]
 o configure: occasional ignorance of --enable-symbol-hiding with GCC

This release includes the following known bugs:

 o see docs/KNOWN_BUGS (https://curl.haxx.se/docs/knownbugs.html)

This release would not have looked like this without help, code, reports and
advice from friends like these:

  Andrew Kurushin, Andrew Robbins, Benjamin Kircher, Daniel Seither,
  Daniel Stenberg, Frank Gevaerts, Gisle Vanem, Ivan Avdeev, Kamil Dudka,
  Marcel Raad, Michael Kaufmann, Ray Satiro, Renaud Lehoux, Romain Coltel,
  Steve Holme, vanillajonathan on github, Viktor Szakáts,
  (17 contributors)

        Thanks! (and sorry if I forgot to mention someone)

References to bug reports and discussions on issues:

 [1] = https://curl.haxx.se/bug/?i=828
 [2] = https://curl.haxx.se/bug/?i=836
 [3] = https://curl.haxx.se/bug/?i=799
 [4] = https://curl.haxx.se/bug/?i=838
 [5] = https://curl.haxx.se/bug/?i=837
 [6] = https://curl.haxx.se/bug/?i=791
 [7] = https://curl.haxx.se/bug/?i=842
 [8] = https://curl.haxx.se/bug/?i=844
 [9] = https://bugzilla.redhat.com/1340757
 [10] = https://curl.haxx.se/bug/?i=822
 [11] = https://curl.haxx.se/bug/?i=815
 [12] = https://curl.haxx.se/bug/?i=855
 [13] = https://curl.haxx.se/bug/?i=840
