Failed to connect to the https WMS server

[christinebao]

Reported from Autodesk QA:

connect to ​https://webgis.dme.qld.gov.au/webgiswms/com.esri.wms.Esrimap/IRTMWMS and meets error. It's a regression defect, 3.8.0 works.

[christinebao]

This error was caused by recently open SSL upgrade. libCurl reports error:

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CURLE_SSL_CONNECT_ERROR (35)

A problem occurred somewhere in the SSL/TLS handshake. You really want the error buffer and read the message there as it pinpoints the problem slightly more. Could be certificates (file formats, paths, permissions), passwords, and others.

More details: error:1407742E:SSL routines:SSL23_GET_SERVER_HELLO:tlsv1 alert protocol version

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By investigation it means client SSL version is different from server's. To avoid reporting this error, make libCurl ignores version difference by setting options:

curl_easy_setopt(curlHandle, CURLOPT_SSLVERSION, 1);

Reference to ​http://mikeytag.tumblr.com/post/29612114990/fixing-ssl-handshake-with-php5-and-curl.

[christinebao]

Thanks Greg Boone for reviewing.

Submit to trunk in r7098, 3.9 branch in r7099.