Merge changes for NSURLSession from EngageHub (formerly Brainstorm).

Headers/Foundation/NSURLRequest.h

@@ -283,6 +283,25 @@ typedef NSUInteger NSURLRequestCachePolicy;
 
 @end
 
+@protocol GSLogDelegate;
+@interface NSMutableURLRequest (GNUstep)
+
+/** Sets a flag to turn on low level debug logging for this request and the
+ * corresponding response.  The previous vaue of the setting is returned.
+ */
+- (int) setDebug: (int)d;
+
+/** Sets a delegate object to override logging of low level I/O of the
+ * request as it is sent and the corresponding response as it arrives.<br />
+ * The delegate object is not retained, so it is the responsibility of the
+ * caller to ensure that it persists until all I/O has completed.<br />
+ * This has no effect unless debug is turned on, but if debug is turned on
+ * it permits the delegate to override the default behavior of writing the
+ * data to stderr.
+ */
+- (id<GSLogDelegate>) setDebugLogDelegate: (id<GSLogDelegate>)d;
+@end
+
 #if	defined(__cplusplus)
 }
 #endif