docs: define semantics of vncpasswd in xl.cfg

A recent discussion around LSN-2016-0001 [1] included defining
the sematics of an empty string for a VNC password. It was stated
that "libxl interprets an empty password in the caller's
configuration to mean that passwordless access should be permitted".

The same applies for vncpasswd setting in xl.cfg. This patch
extends to xl.cfg documentation to define the semantics of setting
vncpasswd to an empty string.

Signed-off-by: Jim Fehlig <jfehlig@suse.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>

diff --git a/docs/man/xl.cfg.pod.5.in b/docs/man/xl.cfg.pod.5.in
index 3bb27d00337d56882dc2efe3884aa590068bbb5d..48c9c0d7c3cbfa9a9b493365fdff135cfa1a3753 100644 (file)
--- a/docs/man/xl.cfg.pod.5.in
+++ b/docs/man/xl.cfg.pod.5.in
@@ -561,7 +561,9 @@ The actual display used can be accessed with C<xl vncviewer>.
 
 =item C<vncpasswd="PASSWORD">
 
-Specifies the password for the VNC server.
+Specifies the password for the VNC server. If password is set to an
+empty string, authentication on the VNC server will be disabled
+allowing any user to connect.
 
 =item C<sdl=BOOLEAN>
 
@@ -1689,7 +1691,9 @@ The actual display used can be accessed with C<xl vncviewer>.
 
 =item B<vncpasswd="PASSWORD">
 
-Specifies the password for the VNC server.
+Specifies the password for the VNC server. If password is set to an
+empty string, authentication on the VNC server will be disabled
+allowing any user to connect.
 
 =item B<keymap="LANG">