xen/public: add missing Xenstore commands to xs_wire.h

The GET_FEATURE, SET_FEATURE, GET_QUOTA and SET_QUOTA Xenstore commands
are defined in docs/misc/xenstore.txt, but they are missing in
xs_wire.h.

Add the missing commands to xs_wire.h

Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>

xen/include/public/io/xs_wire.h

@@ -35,6 +35,10 @@ enum xsd_sockmsg_type
     /* XS_RESTRICT has been removed */
     XS_RESET_WATCHES = XS_SET_TARGET + 2,
     XS_DIRECTORY_PART,
+    XS_GET_FEATURE,
+    XS_SET_FEATURE,
+    XS_GET_QUOTA,
+    XS_SET_QUOTA,
 
     XS_TYPE_COUNT,      /* Number of valid types. */