https://bugs.exim.org/show_bug.cgi?id=3006
git show aae2bf28db36

https://git.exim.org/exim.git/commit/aae2bf28db36ab9133829dc33ea6ef886e8373c2
https://git.exim.org/exim.git/commitdiff/aae2bf28db36ab9133829dc33ea6ef886e8373c2
https://git.exim.org/exim.git/patch/aae2bf28db36ab9133829dc33ea6ef886e8373c2