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Also rearrange input options

This is just a template. Not fully workable

Also merge data_cleanup tasks with syspreps and did a major cleanup

Add --print-data-cleanup and --print sysprep input options. If enabled
the program will output what data cleanup and syspep operations will
and won't run a a selected input media

This method will remove all users that have id over 1000. In most
systems this will remove all normal user accounts besides the first
one. This method will not run by default.

This can be used to create a set of by default disabled data_cleanup
and sysprep tasks.

All printing had to be reordered and now it is done from a central point.

Commit 3f70f242 introduced a bug where the event file was overwritten
instead of the action file.

This commit fixes a bug where size method in DiskDevice returned the
payload size of the device one byte shorter than it actually was.

All modules should use image_creator.FatalError exception to report
fatal errors.

The parameter order when calling guestfs.write was incorrect.

In the constructor only variable initialization is performed. This is
needed because the constructor is executed before the DiskDevice
instance is appended to the device list, and if something fails there,
then the resources may be cleaned up in an incorrect order.

* Add more userdata to be cleaned
* Prefix all data_cleanup methods with data_cleanup

This is used to prepare the media for image extraction. The main
difference from data_cleanup is that the tasks performed with this
method are mandatory in order to make the image workable.

Added the following sysprep methods for linux:
 * sysprep_acpid
 * sysprep_persistent_net_rules
 * sysprep_persistend_devs

This function will remove regular files under /var/cache

This will remove the persitent net udev rule.

This method replaces all non-persistent device appearances in fstab and
grub1 with UUIDs.

The package is buggy and we can use pbs to do the same thing.

This is needed to suppress the StopIteration exception