add back TCP test case

src/internet-stack/tcp-test.cc

@@ -333,9 +333,13 @@ public:
   TcpTestSuite ()
     : TestSuite ("tcp", UNIT)
     {
+      // Arguments to these test cases are 1) totalStreamSize, 
+      // 2) source write size, 3) source read size
+      // 4) server write size, and 5) server read size
+      // with units of bytes
       AddTestCase (new TcpTestCase (13, 200, 200, 200, 200));
       AddTestCase (new TcpTestCase (13, 1, 1, 1, 1));
-      //AddTestCase (new TcpTestCase (100000, 100, 50, 100, 20));
+      AddTestCase (new TcpTestCase (100000, 100, 50, 100, 20));
     }
   
 } g_tcpTestSuite;