[H-GEN] Fixed for the VM backup procedure

[Russell Stuart]

This link below contains  changes to the backup system we did Saturday.

http://www.stuart.id.au/russell/files/pub/humbug-vm-backup-fix.tar.bz2

The changes are:

/etc/image-backup/image-backup.sh

  * A new option, "filter" has been added.  This allows files to be
    munged by a filter before they are backed up.

  * gpg encryption has changed.  Keys are now stored in a directory,
    not a key ring.  In the volatile-config the directory has been 
    set to /etc/image-backup/gpg-keydir.  Doing it this way means
    the keys can be managed by the version control system.

  * The encrypt-dir option has become encrypted-backup, and is now
    the file name.

  * Comments at the top have been updated and spell checked.

/etc/image-backup/volatile-config

  * Fixed a bug which caused it to create a 1.6G image :(.

  * It no longer uses "add" to replace encrypted files.  Instead
    it uses the new "filter" option to make every password "x".

  * Add various mailman config files to the encrypted list.

  * gpg-keydir is set to /etc/image-backup/gog-keydir.

/etc/image-backup/cron.sh

  * This produces new backup images in the www image 
    directory.  Also produces sha1 sums for the 
    resulting images.

/etc/image-backup/skel

  * Not used any more.  Probably should be deleted.

/var/spool/cron/crontabs/root

  * Runs /etc/image-backup/cron.sh every two hours.  This is
    the one thing that hasn't been tested.

The size of the resulting images are:
  237M   base-config
  308M   volatile-config

I am planning to document how to use all this on the wiki.  However one
point I will mention now.  I think it is a good idea if we don't
publicly reveal the URL's to download the images.  Any humbug member can
just ask.  It is not a secret.  It just isn't public.

Please let me know when you have this so I can remove it from my web
site and start testing.  A copy of your gpg key would be handy.