with the perl update I get this:

# /usr/local/libexec/nagios/check_openbgpd -c 10:250000 -u
when is deprecated at /usr/local/libexec/nagios/check_openbgpd line 268.
when is deprecated at /usr/local/libexec/nagios/check_openbgpd line 272.
when is deprecated at /usr/local/libexec/nagios/check_openbgpd line 273.
when is deprecated at /usr/local/libexec/nagios/check_openbgpd line 274.
when is deprecated at /usr/local/libexec/nagios/check_openbgpd line 275.
when is deprecated at /usr/local/libexec/nagios/check_openbgpd line 276.
when is deprecated at /usr/local/libexec/nagios/check_openbgpd line 282.

I'm currently limping along thusly:

--- check_openbgpd~	Thu Dec  7 14:13:36 2023
+++ check_openbgpd	Wed May 15 13:44:09 2024
@@ -7,6 +7,7 @@
 ########################################################################
 use strict;
 use warnings;
+no warnings 'deprecated';

 use 5.010;
 use if $] >= 5.016, experimental => 'switch';

-- 
In my defence, I have been left unsupervised.