As part of T170567 we have made inbound TLSv1.3 available on Wikipedia. Tracking TLSv1.3 adoption on bots hosted on WMCS we have realised that IABot/2.0 is the first UserAgent in terms of traffic from WMCS IPs using TLSv1.2 with 14 million requests during the last 24 hours.
it would be great if TLSv1.3 could be enabled on IABot.
As long as you're using PHP 7.3 (or newer)...
https://www.php.net/manual/en/migration73.constants.php
You should be able to do something like curl_setopt($this->curlHandle, CURLOPT_SSLVERSION, CURL_SSLVERSION_TLSv1_3); to force 1.3 (or higher)
https://github.com/internetarchive/internetarchivebot does say PHP 7.2.9 or higher
Depends how/where you run it in Toolforge..
https://wikitech-static.wikimedia.org/wiki/Help:Toolforge/Kubernetes#PHP
You can easily run it with a PHP 7.3 container...
Added support in v2.0.7, but it will remain backward compatible with previous versions of PHP.