Curl and libcurl 7.52.2

 Public curl releases:         163
 Command line options:         204
 curl_easy_setopt() options:   243
 Public functions in libcurl:  61
 Contributors:                 1480

This release includes the following bugfixes:

 o gnutls-random: check return code for failed random
 o openssl-random: check return code when asking for random
 o http: remove "Curl_http_done: called premature" message
 o cyassl: use time_t instead of long for timeout
 o build-wolfssl: Sync config with wolfSSL 3.10
 o ftp-gss: check for init before use
 o configure: accept --with-libidn2 instead [1]
 o ftp: failure to resolve proxy should return that error code
 o curl.1: add three more exit codes
 o docs/ciphers: link to our own new page about ciphers
 o vtls: s/SSLEAY/OPENSSL - fixes multi_socket timeouts with openssl [2]

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:

  Christian Weisgerber, Daniel Romero, Daniel Stenberg, Ray Satiro,
  (4 contributors)

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

References to bug reports and discussions on issues:

 [1] = https://curl.haxx.se/mail/lib-2016-12/0110.html
 [2] = https://curl.haxx.se/bug/?i=1174