NTFS support.  Requires the Linux NTFS support from:

http://linux-ntfs.sourceforge.net/

The current version uses version 1.7.1 of the NTFS tools and libraries
which can be downloaded via:

http://prdownloads.sourceforge.net/linux-ntfs/ntfsprogs-1.7.1.tar.gz

a copy of which is cached on www.emulab.net and should be downloaded
automatically by the Makefile.
