https://lists.exim.org/lurker/message/20180310.020414.7bc068d5.en.html

https://git.exim.org/exim.git/commit/83d2a8615f6fede0c99dda5cb83dd510d7ad0269
https://git.exim.org/exim.git/commitdiff/83d2a8615f6fede0c99dda5cb83dd510d7ad0269
https://git.exim.org/exim.git/commitdiff_plain/83d2a8615f6fede0c99dda5cb83dd510d7ad0269
https://git.exim.org/exim.git/patch/83d2a8615f6fede0c99dda5cb83dd510d7ad0269