Fixed titles and index entries for kernel headers installation to make more obvious that we are using the linux kernel sources package.

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@7943 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

chapter05/linux-headers.xml

@@ -8,11 +8,11 @@
 <sect1 id="ch-tools-linux-headers" role="wrap">
   <?dbhtml filename="linux-headers.html"?>
 
-  <title>Linux-Headers-&linux-version;</title>
+  <title>Linux-&linux-version; API Headers</title>
 
   <indexterm zone="ch-tools-linux-headers">
-    <primary sortas="a-Linux-Headers">Linux-Headers</primary>
-    <secondary>tools, headers</secondary>
+    <primary sortas="a-Linux">Linux</primary>
+    <secondary>tools, API headers</secondary>
   </indexterm>
 
   <sect2 role="package">
@@ -35,7 +35,7 @@
   </sect2>
 
   <sect2 role="installation">
-    <title>Installation of Linux-Headers</title>
+    <title>Installation of Linux API Headers</title>
 
     <para>The Linux kernel needs to expose an Application Programming Interface
     (API) for the system's C library (Glibc in LFS) to utilize.  This is done