sys-boot/zfsbootmenu: update efi stub location

also add to elog info and point at the ZBM article, as well as adding meyself as a maintainer

Signed-off-by: Ceres <ceres@ceressees.dev>

sys-boot/zfsbootmenu/files/zfsbootmenu-stub-location.patch

@@ -6,7 +6,7 @@ index e8b196c..38b2812 100644
      Enabled: false
  EFI:
    ImageDir: /boot/efi/EFI/zbm
-+  Stub: /usr/lib/systemd/boot/efi/linuxx64.elf.stub
++  Stub: /usr/lib/systemd/boot/efi/linuxx64.efi.stub
    Versions: false
    Enabled: false
  Kernel:

sys-boot/zfsbootmenu/metadata.xml

@@ -9,6 +9,10 @@
     <email>c@cgps.ch</email>
     <name>Chaquen Beliakov Amaya</name>
   </maintainer>
+  <maintainer type="person">
+    <email>ceres@ceressees.dev</email>
+    <name>Ceres Milner</name>
+  </maintainer>
   <upstream>
     <remote-id type="github">zbm-dev/zfsbootmenu</remote-id>
   </upstream>

sys-boot/zfsbootmenu/zfsbootmenu-3.1.0.ebuild

@@ -51,5 +51,8 @@ src_install() {
 
 pkg_postinst () {
 	elog "Please consult Gentoo wiki to configure the bootloader
-	https://wiki.gentoo.org/wiki/ZFS/rootfs#ZFSBootMenu"
+	https://wiki.gentoo.org/wiki/ZFS/ZFSBootMenu"
+	elog "To create en EFI image, an EFI stub loader is needed."
+	elog "To use the stub loader provided by systemdboot, enable
+	the boot and kernel-install USE flags for sys-apps/systemd-utils"
 }