Fix some Markdown formatting issues

Address miscellaneous issues with Markdown formatting in comments which
are consumed by shocco when generating the online documentation.

Change-Id: I953075cdbddbf1f119c6c7e35f039e2e54b79078
diff --git a/lib/rpc_backend b/lib/rpc_backend
index a323d64..ae83e85 100644
--- a/lib/rpc_backend
+++ b/lib/rpc_backend
@@ -3,15 +3,16 @@
 # rpc backend settings
 
 # Dependencies:
-# ``functions`` file
-# ``RABBIT_{HOST|PASSWORD}`` must be defined when RabbitMQ is used
+#
+# - ``functions`` file
+# - ``RABBIT_{HOST|PASSWORD}`` must be defined when RabbitMQ is used
 
 # ``stack.sh`` calls the entry points in this order:
 #
-# check_rpc_backend
-# install_rpc_backend
-# restart_rpc_backend
-# iniset_rpc_backend
+# - check_rpc_backend
+# - install_rpc_backend
+# - restart_rpc_backend
+# - iniset_rpc_backend
 
 # Save trace setting
 XTRACE=$(set +o | grep xtrace)
@@ -200,6 +201,7 @@
 # Restore xtrace
 $XTRACE
 
-# Local variables:
-# mode: shell-script
-# End:
+# Tell emacs to use shell-script-mode
+## Local variables:
+## mode: shell-script
+## End: