As reported, see URL: www-servers/xsp/files/systemd/readme.txt: application/octet-stream; charset=binary (size=1) Not really a binary, but a file consisting of a single line feed only doesn't look like like a readme file that should be installed. Policy reference: https://devmanual.gentoo.org/general-concepts/tree/index.html#what-belongs-in-the-tree%3F
Looks like this has been fixed.