Merge topic 'curl-opt-proxytype' into release-4.1

c8143074cf cmCTestCurl: Avoid using undocumented type for CURLOPT_PROXYTYPE values

Acked-by: Kitware Robot <[email protected]>
Merge-request: !11134

Source/CTest/cmCTestCurl.h

@@ -52,7 +52,7 @@ private:
   std::vector<std::string> HttpHeaders;
   std::string HTTPProxyAuth;
   std::string HTTPProxy;
-  curl_proxytype HTTPProxyType;
+  long HTTPProxyType;
   bool UseHttp10 = false;
   bool Quiet = false;
   int TimeOutSeconds = 0;