net/mail: change in behavior of ParseAddressList("") in 1.15 [1.15 backport] #40804
Description
@ianlancetaylor requested issue #40803 to be considered for backport to the next 1.15 minor release.
@gopherbot Please open backport to 1.15.
This is a minor but unintended change in behavior in 1.15. We should restore the behavior seen in all earlier Go releases.