canonical urlencoded function doc url

Author: lovasoa

examples/official-site/functions.sql

@@ -1,3 +1,8 @@
+select 'http_header' as component,
+    printf('<%s>; rel="canonical"',
+            iif($function is not null, sqlpage.link('functions.sql', json_object('function', $function)), 'functions.sql')
+    ) as "Link";
+
 select 'dynamic' as component, properties
 FROM example WHERE component = 'shell' LIMIT 1;