Doc: Update BGP mask documentation

diff --git a/doc/bird.sgml b/doc/bird.sgml
index d1b90a1d2cbb26aff9c2ecd4abdea0fa50140b4c..cb90e615991465fbfdd216a73209c040d7f4c655 100644 (file)
--- a/doc/bird.sgml
+++ b/doc/bird.sgml
@@ -1473,7 +1473,8 @@ foot).
        but <tt>bgp_path &tilde; [= * 4 5 * =]</tt> is false. BGP mask
        expressions can also contain integer expressions enclosed in parenthesis
        and integer variables, for example <tt>[= * 4 (1+2) a =]</tt>. You can
-        also use ranges, for example <tt>[= * 3..5 2 100..200 * =]</tt>.
+       also use ranges (e.g. <tt>[= * 3..5 2 100..200 * =]</tt>) and sets
+       (e.g. <tt>[= 1 2 [3, 5, 7] * =]</tt>).
 
        <tag><label id="type-clist">clist</tag>
        Clist is similar to a set, except that unlike other sets, it can be