Detect and setup Programmer Dvorak keyboard layout

This patch will add the keyboard layout identifier for the Programmer
Dvorak keyboard layout, so that if a Windows client has that layout
active, it will be mapped to the corresponding xkeyboard-config layout
in the X server.

An XFreeRDP client knows about this layout too, and will correspondingly
map it to the identifier given here, making the layout propagate
correctly through X-to-X connections as well.

To replicate the full Windows keyboard layout several options have to
be set as well as the main layout. To avoid having these options spill
over to other layouts that are dumped, the old settings are stored
before the dump and then restored afterwards.

instfiles/Makefile.am

@@ -50,7 +50,8 @@ dist_startscript_DATA = \
   km-00000813.ini \
   km-00000816.ini \
   km-0000100c.ini \
-  km-00010409.ini
+  km-00010409.ini \
+  km-19360409.ini
 
 #
 # platform specific files