Removing experimental comment on progress handler.

Author: stgates

Release/include/cpprest/http_client.h

@@ -163,9 +163,9 @@ class http_client_config
     /// Set the web proxy object
     /// </summary>
     /// <param name="proxy">A reference to the web proxy object.</param>
-    void set_proxy(const web_proxy& proxy)
+    void set_proxy(web_proxy proxy)
     {
-        m_proxy = proxy;
+        m_proxy = std::move(proxy);
     }
 
     /// <summary>

Release/include/cpprest/http_msg.h

@@ -972,9 +972,6 @@ class http_request
     ///    progress: the number of bytes that have been processed so far.
     /// </param>
     /// <remarks>
-    ///   **EXPERIMENTAL**
-    ///   This function is subject to change based on user feedback.
-    ///
     ///   This function will be called at least once for upload and at least once for
     ///   the download body, unless there is some exception generated. An HTTP message with an error
     ///   code is not an exception. This means, that even if there is no body, the progress handler