Implemented resize and multimon support for VNC backend

docs/man/sesman.ini.5.in

@@ -148,12 +148,12 @@ This works only with xorgxrdp session. Moreover, xorgxrdp must be v0.2.9 or late
 
 .TP
 \fBPolicy\fR=\fI[Default|UBD|UBI|UBC|UBDI|UBDC]\fR
-Session allocation policy. By default, a new session is created
-for the combination <User,BitPerPixel> when using Xrdp, and
-for the combination <User,BitPerPixel,DisplaySize> when using Xvnc.
-This behavior can be changed by setting session policy to:
+Session allocation policy. Used to decide when to allocate a
+new session. Set to one of the following values:
 .br
 
+.br
+\fBDefault\fR - session per <User,BitPerPixel>
 .br
 \fBUBD\fR - session per <User,BitPerPixel,DisplaySize>
 .br
@@ -168,7 +168,8 @@ This behavior can be changed by setting session policy to:
 
 .br
 Note that the \fBUser\fR and \fBBitPerPixel\fR criteria cannot be turned
-off. For Xvnc connections, \fBDisplaySize\fR is always enabled as well.
+off. \fBDisplaySize\fR refers to the initial geometry of a connection,
+as actual display sizes can change dynamically.
 .br
 
 .SH "SECURITY"

docs/man/xrdp.ini.5.in

@@ -302,6 +302,14 @@ Specifies color depth of the backend X server. The default is the color
 depth of the client. Only Xvnc and X11rdp use that setting. Xorg runs at
 \fI24\fR bpp.
 
+.TP
+\fBdisabled_encodings_mask\fR=\fI<number>\fR
+Set this bitmask to a non-zero value to prevent \fBxrdp\fR(8) requesting
+some features from the Xvnc server. You should only need to set this
+to  a non-zero value to work around bugs in your Xvnc server. The bit
+values supported for a particular release of \fBxrdp\fR(8) are documented in
+\fBxrdp.ini\fR.
+
 .TP
 \fBcode\fR=\fI<number>\fR|\fI0\fR
 Specifies the session type. The default, \fI0\fR, is Xvnc, \fI10\fR is