Comments on units added to example config file

horusmapper.cfg.example

@@ -217,6 +217,8 @@ bearing_custom_color = #FF0000
 [units]
 
 # unitselection allows choice of metric - the default or imperial - horizontal miles and feet for short distances, horizontal miles per hour,  vertical feet, vertical feet per minute
+# this is applied only to the indications and to the range ring settings
+
 
 unitselection = metric
 #unitselection = imperial