Add a truncate() method to truncate an address to a specified number of bits.
Add a truncate() method to truncate an address to a specified number of
bits.


git-svn-id: fcb33a7ee5ec38b96370833547f088a4e742b712@1642 c76caeb1-94fd-44dd-870f-0c9d92034fc1

justinsb/dnsjava