docs/man/xl.cfg.pod.5: document global VNC options for VFB device

Update xl.cfg to reflect change in 706d4ab74 "xl: create VFB for PV
guest when VNC is specified".

Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>

diff --git a/docs/man/xl.cfg.pod.5 b/docs/man/xl.cfg.pod.5
index 72efd8819ba3ae6d9f894cbbfafaf145a7149714..99413950d93ff587e1846a3f4a6684af9f4547b7 100644 (file)
--- a/docs/man/xl.cfg.pod.5
+++ b/docs/man/xl.cfg.pod.5
@@ -387,7 +387,10 @@ to the domain.
 
 This options does not control the emulated graphics card presented to
 an HVM guest. See L<Emulated VGA Graphics Device> below for how to
-configure the emulated device.
+configure the emulated device. If L<Emulated VGA Graphics Device> options
+are used in a PV guest configuration, xl will pick up B<vnc>, B<vnclisten>,
+B<vncpasswd>, B<vncdisplay> and B<vncunused> to construct paravirtual
+framebuffer device for the guest.
 
 Each B<VFB_SPEC_STRING> is a comma-separated list of C<KEY=VALUE>
 settings, from the following list: