Merge pull request #379 from SvenDowideit/mention-channel-code

Mention the channel code in man page.

docs/man/xrdp.ini.5

@@ -215,6 +215,10 @@ Specifies the ip address of the host to connect to.
 \fBport\fR=\fI<number>\fR|\fI\-1\fR
 Specifies the port number to connect to. If set to \fI\-1\fR, the default port for the specified library is used.
 
+.TP
+\fBcode\fR=\fI<number>\fR|\fI\-1\fR
+Specifies the session type, the default, \fI\0\fR, is Xvnc, \fI\10\fR, is X11rdp, and \fI\20\fR, uses Xorg driver mode.
+
 .SH "EXAMPLES"
 This is an example \fBxrdp.ini\fR: