lib: Lessen restrictions on VIR_DOMAIN_START_AUTODESTROY

Apart from migrating the VM to a remote host where we can't honour the
VIR_DOMAIN_START_AUTODESTROY flag properly, restricting APIs which just
modify the state of the VM does not make much sense.

Change the wording of the documentation for VIR_DOMAIN_START_AUTODESTROY
so that snapshots and saving to a file may be permitted as they
semantically don't clash with the flag itself. Otherwise we'd have to
forbid other APIs, such as virDomainDestroy as well.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NEric Blake <eblake@redhat.com>

src/libvirt-domain.c

@@ -152,7 +152,8 @@ virDomainGetConnect(virDomainPtr dom)
  * object is finally released. This will also happen if the
  * client application crashes / loses its connection to the
  * libvirtd daemon. Any domains marked for auto destroy will
- * block attempts at migration, save-to-file, or snapshots.
+ * block attempts at migration. Hypervisors may also block save-to-file,
+ * or snapshots.
  *
  * virDomainFree should be used to free the resources after the
  * domain object is no longer needed.
@@ -217,7 +218,8 @@ virDomainCreateXML(virConnectPtr conn, const char *xmlDesc,
  * object is finally released. This will also happen if the
  * client application crashes / loses its connection to the
  * libvirtd daemon. Any domains marked for auto destroy will
- * block attempts at migration, save-to-file, or snapshots.
+ * block attempts at migration. Hypervisors may also block
+ * save-to-file, or snapshots.
  *
  * virDomainFree should be used to free the resources after the
  * domain object is no longer needed.
@@ -6565,7 +6567,8 @@ virDomainCreate(virDomainPtr domain)
  * object is finally released. This will also happen if the
  * client application crashes / loses its connection to the
  * libvirtd daemon. Any domains marked for auto destroy will
- * block attempts at migration, save-to-file, or snapshots.
+ * block attempts at migration. Hypervisors may also block save-to-file,
+ * or snapshots.
  *
  * If the VIR_DOMAIN_START_BYPASS_CACHE flag is set, and there is a
  * managed save file for this domain (created by virDomainManagedSave()),