sesman: bring Xorg at the top in sesman.ini

as Xorg prefered recommended backend now. Add more comments.

sesman/sesman.ini

@@ -54,21 +54,9 @@ LogLevel=DEBUG
 EnableSyslog=1
 SyslogLevel=DEBUG
 
-[X11rdp]
-param=X11rdp
-param=-bs
-param=-nolisten
-param=tcp
-param=-uds
-
-[Xvnc]
-param=Xvnc
-param=-bs
-param=-nolisten
-param=tcp
-param=-localhost
-param=-dpi
-param=96
+;
+; Session definitions - startup command-line parameters for each session type
+;
 
 [Xorg]
 ; Specify the path of non-suid Xorg executable. It might differ depending
@@ -90,6 +78,22 @@ param=tcp
 param=-logfile
 param=.xorgxrdp.%s.log
 
+[X11rdp]
+param=X11rdp
+param=-bs
+param=-nolisten
+param=tcp
+param=-uds
+
+[Xvnc]
+param=Xvnc
+param=-bs
+param=-nolisten
+param=tcp
+param=-localhost
+param=-dpi
+param=96
+
 [Chansrv]
 ; drive redirection, defaults to xrdp_client if not set
 FuseMountName=thinclient_drives