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This task is used when deploying Linux instances to alter the
content of `/etc/machine-id`. This file contains an ID that is supposed
to be globally unique. When deploying an image it is better to
regenerate a random new one to assure the uniqueness. For more info
check:

https://www.freedesktop.org/software/systemd/man/machine-id.html

Update the architecture documentation to reflect the current state of
the configuration tasks.

Add support for Network Manager

Before executing a network configuration script, print its argument to
have them logged.

Introduce the new NM_NETWORKING image property that will force the
creation of Network Manager configuration files if defined

Rename debian.sh to ifupdown.sh and redhat.sh to ifcfg.sh. This is done
to make things more clear in case we add more network drivers that do
apply to Debian and RedHat like a driver for NetworkManager.

* Fix a list that was parsed incorrect
* Make some links with name "here", "diskdump", "md5sum" and "metadata"
  anonymous, so that sphinx stops complaining that those names are
  defined multiple times.

Conflicts:
	docs/version.py
	version
	version.m4

Bump version to 0.20 and use the version form introduced in devflow 0.13

When parsing /etc/fstab in mount_all(), regard entries with "auto" in
the fs_vfstype field as mountable.

Prior to this commit, snf-image would fail with "fstab contains
non-persistent block device names" if no useful entries where found
in /etc/fstab which is a bug.

Old QEMU versions used -drive file=<file>,iface=<iface> in order
to define a virtual disk. Until now snf-image was using this
deprecated method and launched the helper using the virtio
interface. Here we use the new interface which goes down to:

 -drive file=<file>,iface=none,id=disk0
 -device <driver>,drive=disk0

Ganeti exports the disk type to be used as INSTANCE_HV_disk_type.
Some of the allowed values are: paravirtual, scsi, scsi-hd,
scsi-generic, scsi-block, etc.

In case of paravirtual device type the <driver> will be
"virtio-blk-pci" and the helper will see the disk as /dev/vdb.

If the disk type is scsi'ish then the helper will see the device as
/dev/sda and the <driver> will be:

  - scsi-hd for scsi
  - the same as disk type otherwise

Note that in case of a scsi'ish disk type an extra SCSI controller
(virtio-scsi-pci) is added to the QEMU command line.
Signed-off-by: Dimitris Aragiorgis <dimitris.aragiorgis@gmail.com>

Commits e147e00 and c4f1bff in Ganeti add support for userspace-only
disks. That means that we could have an instance without a local
block device (e.g. using the embedded support in QEMU for rbd by
passing -drive file=rbd:pool/image_name without the need of a
/dev/rdbX device).

This patch does the following:

Introduce a find_disk() helper method that first checks the
DISK_IDX_PATH and if it is not exported then it returns
DISK_IDX_URI.

Introduce a losetup_disk() helper method that is used during
export/import and in case we have an ntfsdump/extdump image type.
Signed-off-by: Dimitris Aragiorgis <dimitris.aragiorgis@gmail.com>

OpenBSD is currently not well supported

Let the user provide their own dd and/or blockdev commands,
if desired.
Signed-off-by: Dimitris Aragiorgis <dimitris.aragiorgis@gmail.com>

Document the way boolean properties are treated (via
check_yes_no()).
Signed-off-by: Dimitris Aragiorgis <dimitris.aragiorgis@gmail.com>

Point to Fedora 23 diskdump and Oracle Linux 7

This image property can be used to prevent all 3 FilesystemResize
tasks (FilesystemResizeUnmounted, FilesystemResizeMounted,
FilesystemResizeAfterUmount) from running without having to define
an EXCLUDE_TASK image property for each one of them.

Create a XEN_CMD variable that will host the Xen CLI tool to be used.
This depends on the Xen version and configuration. Older versions of Xen
used xm. This was deprecated in favor of xl in version 4.1 and
completely removed in version 4.5.

Fix a bug where an extra empty RunSynchronousCommand element was added
to the Windows unattend.xml file.

This can be used to specify a URI hosting a Windows answer file to be
injected to the image during deployment. Depending on the image (windows
or windows-legacy) this file can either be an xml file (unattend.xml) or
an inf one (sysprep.inf). The file gets higher priority than the file
that may be hosted inside the image.

This can be used to specify the time zone in the answer file that will
be injected to the Windows Image.

If a windows-legacy image does not host a sysprep.inf file, then add
one during the deployment. The default one is hosted by snf-image-host
and is passed to snf-image-helper through the configuration floppy. The
same mechanism is used for unattend.xml, where the default file is moved
to snf-image-host.

The administrator password in Windows XP is a special case. If the
AdminPassword entry of the GuiUnattended section is missing, then the
installation is not unattended.

In InstallUnattend task, check if the image is sysprepped. If this is
not the case, then fail.