rbl.lua: add reference to documentation

diff --git a/src/plugins/lua/rbl.lua b/src/plugins/lua/rbl.lua
index bb0732820855fecc276acd791cfa1d2692a3f130..717520c4c3d614de6839491756a75b1abf8a11c1 100644 (file)
--- a/src/plugins/lua/rbl.lua
+++ b/src/plugins/lua/rbl.lua
@@ -1,3 +1,7 @@
+-- This plugin implements various types of RBL checks
+-- Documentation can be found here:
+-- https://rspamd.com/doc/modules/rbl.html
+
 local rbls = {}
 
 local rspamd_logger = require "rspamd_logger"