Remove DeferUpdate from man pages

The funcationality was removed in 6e49e95, so let's also clean up
the documentation referring to it.

unix/x0vncserver/x0vncserver.man

@@ -200,22 +200,6 @@ Milliseconds per one polling cycle.  Actual interval may be dynamically
 adjusted to satisfy \fBMaxProcessorUsage\fP setting.  Default is 30.
 .
 .TP
-.B DeferUpdate
-x0vncserver uses a "deferred update" mechanism which enhances performance in
-many cases. After any change to the framebuffer, x0vncserver waits for this
-number of milliseconds (default 1) before sending an update to any waiting
-clients. This means that more changes tend to get coalesced together in a
-single update. Setting it to 0 results in the same behaviour as earlier
-versions of x0vncserver, where the first change to the framebuffer causes an
-immediate update to any waiting clients.
-.
-.TP
-.B AlwaysSetDeferUpdateTimer
-Keep delaying sending the screen update to the client(s) each time the
-screen is updated. Otherwise the delay is from the first update. Default
-is off.
-.
-.TP
 .B CompareFB
 Perform pixel comparison on framebuffer to reduce unnecessary updates. Can
 be either \fB0\fP (off), \fB1\fP (always) or \fB2\fP (auto). Default is

unix/xserver/hw/vnc/Xvnc.man

@@ -110,22 +110,6 @@ file is accessed each time a connection comes in, so it can be changed on the
 fly via \fBvncpasswd\fP(1).
 .
 .TP
-.B \-DeferUpdate \fItime\fP
-Xvnc uses a "deferred update" mechanism which enhances performance in many
-cases. After any change to the framebuffer, Xvnc waits for this number of
-milliseconds (default 1) before sending an update to any waiting clients. This
-means that more changes tend to get coalesced together in a single
-update. Setting it to 0 results in the same behaviour as earlier versions of
-Xvnc, where the first change to the framebuffer causes an immediate update to
-any waiting clients.
-.
-.TP
-.B \-AlwaysSetDeferUpdateTimer
-Keep delaying sending the screen update to the client(s) each time the
-screen is updated. Otherwise the delay is from the first update. Default
-is off.
-.
-.TP
 .B \-AcceptCutText
 Accept clipboard updates from clients (default is on).
 .