Remove support for x11rdp

X11rdp has been deprecated now since xrdp v0.9.7 (June 2018). This
commit removes support for it from xrdp itself.

docs/man/sesman.ini.5.in

@@ -24,10 +24,6 @@ Session management
 \fB[Security]\fR
 Access control
 
-.TP
-\fB[X11rdp]\fR, \fB[Xvnc]\fR, \fB[Xorg]\fR
-X11 server settings for supported servers
-
 .TP
 \fB[Chansrv]\fR
 Settings for xrdp-chansrv(8)
@@ -297,7 +293,7 @@ If set to \fB1\fR, \fBtrue\fR or \fByes\fR, require group membership even
 if the group specified in \fBTerminalServerUsers\fR doesn't exist.
 
 .SH "X11 SERVER"
-Following parameters can be used in the \fB[X11rdp]\fR, \fB[Xvnc]\fR and
+Following parameters can be used in the \fB[Xvnc]\fR and
 \fB[Xorg]\fR sections.
 
 .TP

docs/man/xrdp-sesrun.8.in

@@ -40,7 +40,7 @@ Set session bits-per-pixel (colour depth). Some session types (i.e. Xorg)
 will ignore this setting.
 .TP
 .B -t <session-type>
-Session type - one of Xorg, Xvnc or X11rdp. Alternatively, for testing
+Session type - one of Xorg or Xvnc. Alternatively, for testing
 only, use the numeric session code.
 .TP
 .B -D <directory>

docs/man/xrdp.ini.5.in

@@ -336,7 +336,7 @@ Specifies the port number to connect to. If set to \fI\-1\fR, the default port f
 .TP
 \fBxserverbpp\fR=\fI<number>\fR
 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
+depth of the client. Only Xvnc uses that setting. Xorg runs at
 \fI24\fR bpp.
 
 .TP
@@ -349,8 +349,8 @@ values supported for a particular release of \fBxrdp\fR(8) are documented in
 
 .TP
 \fBcode\fR=\fI<number>\fR|\fI0\fR
-Specifies the session type. The default, \fI0\fR, is Xvnc, \fI10\fR is
-X11rdp, and \fI20\fR is Xorg with xorgxrdp modules.
+Specifies the session type. The default, \fI0\fR, is Xvnc,
+and \fI20\fR is Xorg with xorgxrdp modules.
 
 .TP
 \fBchansrvport\fR=\fBDISPLAY(\fR\fIn\fR\fB)\fR|\fI/path/to/domain-socket\fR