Add the function range comment back in

Author: HaroldCindy

lsl_definitions.yaml

@@ -1,3 +1,18 @@
+#        ************
+#        * IMPORTANT*
+#        ************
+#        * Adding new functions and selecting function ids (for LSO):
+#
+#        When adding functions it is important to select an available function ID from an open range.
+#        Select a new ID from the open ranges listed below and update the list.
+#        The following ranges are available for use:
+#
+#            561 - 589, 593 - 599,
+#            605 - 649, 663 - 699, 719 - 749, 751 - 759,
+#            763 - 799, 804 - 1023
+#            430 - 499 (appears to be open but use with caution.)
+
+
 # increment only when the file format changes, not just the content
 # retain the "llsd-" prefix for compatibility...
 llsd-lsl-syntax-version: 2