Add env variable to turn on curl verbose

common/kicad_curl/kicad_curl_easy.cpp

@@ -130,10 +130,16 @@ KICAD_CURL_EASY::KICAD_CURL_EASY() :
     curl_easy_setopt( m_CURL, CURLOPT_PROTOCOLS, CURLPROTO_HTTP | CURLPROTO_HTTPS );
 #endif
 
-    #ifdef _WIN32
+#ifdef _WIN32
     // We need this to use the Windows Certificate store
     curl_easy_setopt( m_CURL, CURLOPT_SSL_OPTIONS, CURLSSLOPT_NATIVE_CA );
-    #endif
+#endif
+
+    if( wxGetEnv( wxT( "KICAD_CURL_VERBOSE" ), nullptr ) )
+    {
+        // note: curl verbose will end up in stderr
+        curl_easy_setopt( m_CURL, CURLOPT_VERBOSE, 1L );
+    }
 
     wxPlatformInfo platformInfo;
     wxString application( Pgm().App().GetAppName() );