This is an auto-filled bug because this package installs init script that uses deprecated #!/sbin/runscript instead of #!/sbin/openrc-run. * Messages for package sys-fs/udev-init-scripts-27: * QA Notice: #!/sbin/runscript is deprecated, use #!/sbin/openrc-run instead: * //etc/init.d/udev
See https://bugs.gentoo.org/show_bug.cgi?id=593604#c3
This was fixed in some subsequent release.