gentoo-overlay/x11-misc/xscreensaver/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
  <herd>desktop-misc</herd>
  <upstream>
    <maintainer>
      <email>jwz@jwz.org</email>
      <name>Jamie Zawinski</name>
    </maintainer>
  </upstream>
  <use>
    <flag name='gdm'>Use gdmflexiserver from <pkg>gnome-base/gdm</pkg> instead of <pkg>x11-misc/lightdm</pkg></flag>
    <flag name='new-login'>Enable user switching support using gdmflexiserver (<pkg>x11-misc/lightdm</pkg>) or kdmctl (<pkg>kde-base/kdm</pkg>)</flag>
  </use>
</pkgmetadata>