port update of rdiff-backup and rdiff-backup-devel

[Sam Lawrance]

Hello,

Users of rdiff-backup are probably aware that rdiff-backup 1.0.1 is
out.  This is the logical next version for users of both rdiff-backup
and rdiff-backup-devel.

This is a little heads up to let you know what will be happening
shortly.

* rdiff-backup will be updated to 1.0.1.

* rdiff-backup-devel will be removed because it is no longer developed,
and an entry added to MOVED to migrate those users to rdiff-backup.

* an entry will be added to UPDATING to explain that users of
rdiff-backup will need to re-do the initial seed if they decide to
update to version 1.0.1.

Cheers
Sam