ref-manual: Couple tweaks to chapter 11.

index 4aafaea..c66aa0d 100644
@@ -7,8 +7,8 @@
 
     <para>
         This chapter provides a reference of shipped machine and distro features
-        you can include as part of the image, a reference on image types you can
-        build, and a reference on feature backfilling.
+        you can include as part of your image, a reference on image features you can
+        select, and a reference on feature backfilling.
     </para>
 
     <para>

@@ -16,7 +16,10 @@
         should be included in the generated images.
         Distributions can select which features they want to support through the
         <filename><link linkend='var-DISTRO_FEATURES'>DISTRO_FEATURES</link></filename>
-        variable, which is set in the <filename>poky.conf</filename> distribution configuration file.
+        variable, which is set or appended to in a distribution's configuration file such as
+        <filename>poky.conf</filename>,
+        <filename>poky-tiny.conf</filename>,
+        <filename>poky-lsb.conf</filename> and so on.
         Machine features are set in the
         <filename><link linkend='var-MACHINE_FEATURES'>MACHINE_FEATURES</link></filename>
         variable, which is set in the machine configuration file and