Merge remote-tracking branch 'origin/pr/360' into pr-359-merge

* origin/pr/360:
  Document default_dispvm preload feature

Author: marmarek

doc/manpages/qvm-features.rst

@@ -429,13 +429,15 @@ on it.
 preload-dispvm-max
 ^^^^^^^^^^^^^^^^^^
 
-Number of disposables to preload. Upon setting, the quantity of running
-preloaded disposables will be adjusted to match the maximum configured, if there
-is not enough of them and there is enough available memory on the system, new
-ones will be created, if there are more than enough, the excess will be removed.
+Number of disposables to preload. Upon setting, the number of running preloaded
+disposables will be adjusted to match the maximum configured, if there is not
+enough of them and there is enough available memory on the system, new ones will
+be created, if there are more than enough, the excess will be removed. When set
+on `dom0`, preloaded disposables will derive from the `default_dispvm` and its
+setting has precedence over the qube disposable template feature.
 
 |
-| **Valid on**: disposable template
+| **Valid on**: disposable template and dom0
 | **Type**: `int`
 | **Default**: `0`