--- a/plugins/mod_s2s/mod_s2s.lua	Sun Jun 23 16:16:26 2019 +0200
+++ b/plugins/mod_s2s/mod_s2s.lua	Wed May 12 17:22:02 2021 +0200
@@ -276,7 +276,7 @@
 end
 
 --- Helper to check that a session peer's certificate is valid
-function check_cert_status(session)
+local function check_cert_status(session)
 	local host = session.direction == "outgoing" and session.to_host or session.from_host
 	local conn = session.conn:socket()
 	local cert