Various improvements

- Move switch spec from Aether to SD-Fabric. Update the list
- Move ONIE/ONL deployment/troubleshooting section from Aether to SD-Fabric

Change-Id: I3eaeb839f8e1fc595a775c305246c7659bb82cdb
diff --git a/conf.py b/conf.py
index 7fa7edf..e949e7a 100644
--- a/conf.py
+++ b/conf.py
@@ -265,7 +265,8 @@
     'sysapproach5g': ('https://5g.systemsapproach.org/', None),
     'sysapproachnet': ('https://book.systemsapproach.org/', None),
     'sysapproachsdn': ('https://sdn.systemsapproach.org/', None),
-    }
+    'aether': ('https://docs.aetherproject.org/master', None),
+}
 
 def setup(app):