Reset poky to before our libpam hacks

Things got a bit out of synch with openbmc-config due to the libpam
issues and the migration from the meta-* layers.

Revert the two previous commits and then put the latest poky in with the
libpam revert and get openbmc-config right again.

Revert "Revert "libpam: update 1.3.1 -> 1.5.1""

This reverts commit 87ddd3eab4df68e624b5350ccaab28b3b97547c0.

Revert "poky: subtree update:796be0593a..10c69538c0"

This reverts commit c723b72979bfac6362509cf1fe086900f6641f28.

Change-Id: I3a1f405193aee6a21fe0cd24be9927c143a23d9a
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
diff --git a/poky/documentation/transitioning-to-a-custom-environment.rst b/poky/documentation/transitioning-to-a-custom-environment.rst
index abbd74c..415f295 100644
--- a/poky/documentation/transitioning-to-a-custom-environment.rst
+++ b/poky/documentation/transitioning-to-a-custom-environment.rst
@@ -29,8 +29,8 @@
 
 #. **Find and acquire the best BSP for your target**.
    Use the :yocto_home:`Yocto Project curated layer index
-   </software-overview/layers/>` or even the :oe_layerindex:`OpenEmbedded
-   layer index <>` to find and acquire the best BSP for your
+   </software-overview/layers/>` or even the `OpenEmbedded layer index
+   <https://layers.openembedded.org>`_ to find and acquire the best BSP for your
    target board. The Yocto Project layer index BSPs are regularly validated. The
    best place to get your first BSP is from your silicon manufacturer or board
    vendor – they can point you to their most qualified efforts. In general, for