Sequencing start/stop of docker and libvirt moved into emhttp. After network services (smb, afp, nfs) have

been started we start docker (if enabled) and then libvirt (if enabled), and only if array is Started in
non-maintenance mode. Upon array Stop, libvirt is stopped first, then docker, then network services.

The libvirt loopback image now exists on the "system" system share.  Script ./dynamix.vm.manager/scripts/libvirt_init
is invoked each time libvirt is started to handle initialization of the mounted image file if necessary.  Also got
rid of the old way libvirt loopback was initialized via compressed tar file.

Create/mount of docker and libvirt loopback images implemented in /usr/local/sbin/mount_image script.

The docker and libvirt loopback image files by default are located on /mnt/user/system/docker.img and
/mnt/user/system/libvirt/libvirt.img.

Default /boot/config/docker.cfg and /boot/config/domains.cfg added to flash image.  This is so that docker and
libvirt start out enabled.

The /boot/config/shares/{appdata,domains,isos,system}.cfg files are created each time array Starts if they do
not exist already. This establishes defaults for these so-called "system" shares.

The "appdata", "domains", and "system" system shares have setting shareUseCache="only".  These shares therefore
cannot be auto-created unless/until a cache disk/pool is available.

plugins/dynamix.vm.manager/scripts/libvirt_init

@@ -0,0 +1,20 @@
+#!/bin/sh
+
+OLD_IMAGE=/boot/config/plugins/dynamix.kvm.manager/domain.img
+if [ ! -f $OLD_IMAGE ]; then
+  OLD_IMAGE=/boot/config/plugins/virtMan/virtMan.img
+  if [ ! -f $OLD_IMAGE ]; then
+    OLD_IMAGE=
+  fi
+fi
+if [ "$OLD_IMAGE" != "" ]; then
+  mount $OLD_IMAGE /etc/libvirt-
+  cp -rp /etc/libvirt-/* /etc/libvirt
+  umount /etc/libvirt-
+  if [ ! -f /etc/libvirt/hooks/qemu ]; then
+    mkdir -p /etc/libvirt/hooks
+    cp -p /etc/libvirt-/hooks/qemu /etc/libvirt/hooks/qemu 
+  fi
+else
+  cp -rp /etc/libvirt-/* /etc/libvirt
+fi