docs: Add version info for 'backingStoreInput' in domaincaps

Add 'since 5.10' as commonly used in formatdomain to avoid
misunderstandings if element is not present (Is it not supported
because of my version or because of my environment?)

Signed-off-by: Sebastian Mitterle <smitterl@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>

diff --git a/docs/formatdomaincaps.html.in b/docs/formatdomaincaps.html.in
index 4056e0bd312736cf45a56d860befe4119365cbcd..7df9f0bbbf073fa05f43c98ddf98250f9f0a6bdd 100644 (file)
--- a/docs/formatdomaincaps.html.in
+++ b/docs/formatdomaincaps.html.in
@@ -562,6 +562,7 @@
     <p>Reports whether the hypervisor will obey the &lt;backingStore&gt;
     elements configured for a &lt;disk&gt; when booting the guest, hotplugging
     the disk to a running guest, or similar.
+    <span class="since">(Since 5.10)</span>
     </p>
 
     <h4><a id="featureBackup">backup</a></h4>