Print the traceback of TCP client Exception

The function now prints the system execution information upon an
exception.
The last commit requested traceback information, but did not print the
information to the console.

pyModeS/extra/tcpclient.py

@@ -275,7 +275,7 @@ class BaseClient(Thread):
                 # for debugging purposes
                 debug_intent = os.environ.get('PYMODES_DEBUG', None)
                 if debug_intent.lower() == 'true':
-                    sys.exc_info()
+                    print(sys.exc_info())
                     sys.exit()
                 else:
                     print("Unexpected Error:", e)