Include the `url' in the http client response.

This way, we can get the real url used by the lib, especially when there are query parameters.

library/network/http_client/src/http_client_response.e

@@ -13,11 +13,12 @@ create
 
 feature {NONE} -- Initialization
 
-	make
+	make (a_url: like url)
 			-- Initialize `Current'.
 		do
 				--| Default values
 			status := 200
+			url := a_url
 			create {STRING_8} raw_header.make_empty
 		end
 
@@ -36,6 +37,9 @@ feature {HTTP_CLIENT_REQUEST} -- Status setting
 
 feature -- Access
 
+	url: STRING_8
+			-- URL associated with Current response
+
 	status: INTEGER assign set_status
 			-- Status code of the response.
 

library/network/http_client/src/spec/libcurl/libcurl_http_client_request.e

@@ -207,7 +207,7 @@ feature -- Execution
 				create l_curl_string.make_empty
 				curl_easy.setopt_curl_string (curl_handle, {CURL_OPT_CONSTANTS}.curlopt_writedata, l_curl_string)
 
-				create Result.make
+				create Result.make (l_url)
 				l_result := curl_easy.perform (curl_handle)
 
 				--| Result
@@ -224,7 +224,7 @@ feature -- Execution
 				curl.global_cleanup
 				curl_easy.cleanup (curl_handle)
 			else
-				create Result.make
+				create Result.make (url)
 				Result.set_error_occurred (True)
 			end