[necovek]

I am pretty confident it broke for me between 12.04 and 14.04 Ubuntu releases, and I am pretty sure both were already in the 2.x series.

Most likely the change in NameVirtualHost behaviour as listed at https://httpd.apache.org/docs/2.4/upgrading.html, but there are a bunch of other changes too.

[midasuni]

Oh sure every few years when you upgrade to a new OS, but not a normal security upgrade.