Apache Traffic Control 4.1.1 isn't available at https://downloads.apache.org/trafficcontrol/ and there's no mention of it on https://trafficcontrol.apache.org/releases/ , but according to our security policy ( https://github.com/apache/trafficcontrol/blob/master/SECURITY.md ), 4.1.x and 5.1.x are our 2 supported versions.
As a side note, 5.0.0 is available on https://downloads.apache.org/trafficcontrol/ and https://trafficcontrol.apache.org/releases/ , yet our security policy lists 5.0.x as unsupported. -Zach
