bug: connections created through 'net use' or 'map network drive' are not fully removed by 'nfs_mount -d'. the UNMOUNT upcall completes successfully, but the mount remains visible in net use and windows explorer; the next attempted use of the drive will send a new MOUNT and continue normally
solution: added flag CONNECT_UPDATE_PROFILE to WNetCancelConnection2(): "The system updates the user profile with the information that the connection is no longer a persistent one."
Signed-off-by: Casey Bodley <cbodley@umich.edu>
