Final head of the former 2.1 branch

1. 01b3aa4 Fix use of list.append() with multiple arguments by Andrew M. Kuchling · 25 years ago
2. 4117e54 nannified by Guido van Rossum · 27 years ago
3. 8c8e814 Add link to Anthony Baxter's enhanced version. by Guido van Rossum · 27 years ago
4. ef25370 print MX record by Guido van Rossum · 29 years ago
5. 29b1606 Adapted to CNRI by Guido van Rossum · 29 years ago
6. 705d517 initial checkin by Guido van Rossum · 31 years ago