GH #127: Eliminate -Wshadow warnings

- fixed GH #127: Eliminate -Wshadow warnings
- SocketAddress small object optimization

Net/testsuite/src/DatagramSocketTest.cpp

@@ -66,10 +66,10 @@ void DatagramSocketTest::testEcho()
 {
 	UDPEchoServer echoServer;
 	DatagramSocket ss;
+	char buffer[256];
 	ss.connect(SocketAddress("localhost", echoServer.port()));
 	int n = ss.sendBytes("hello", 5);
 	assert (n == 5);
-	char buffer[256];
 	n = ss.receiveBytes(buffer, sizeof(buffer));
 	assert (n == 5);
 	assert (std::string(buffer, n) == "hello");

Net/testsuite/src/UDPEchoServer.h

@@ -66,7 +66,7 @@ public:
 		
 	void run();
 		/// Does the work.
-		
+
 private:
 	Poco::Net::DatagramSocket _socket;
 	Poco::Thread _thread;