Created attachment 180865 [details]
Are you aware that there's no such thing like devel/libevent2?
Created attachment 181204 [details]
devel/libevent2 has been renamed to devel/libevent a month ago. Before this it had the newest version.
Attaching the updated patch.
A commit references this bug:
Date: Sun Mar 26 18:30:24 UTC 2017
New revision: 436976
Update to 0.2.9.10.
Submitted by: Yuri Victorovich <email@example.com> (maintainer)