removed /lib and /usr/lib from ld.so.conf, updated explanation of the file's usage

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@1662 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

chapter06/config-ldso.xml

@@ -1,14 +1,18 @@
 <sect2>
 <title>Configuring Dynamic Loader</title>
 
-<para>By default the dynamic loader searches a few default paths for dynamic
-libraries, so there normally isn't a need for the
-<filename>/etc/ld.so.conf</filename> file unless the system has extra
-directories in which you want the system to search for libraries. The
-<filename class="directory">/usr/local/lib</filename> directory isn't
-searched through for dynamic libraries by default, so we want to add
-this path so when you install software you won't be surprised by them not
-running for some reason.</para>
+<para>By default, the dynamic loader
+(<filename>/lib/ld-linux.so.2</filename>) searches through <filename
+class="directory">/lib</filename> and <filename
+class="directory">/usr/lib</filename> for dynamic libraries that are needed
+by programs when you run them. However, if there are libraries in
+directories other than <filename class="directory">/lib</filename> and
+<filename class="directory">/usr/lib</filename>, you need to add them to
+the <filename>/etc/ld.so.conf</filename> file in order for the dynamic
+loader to find them. One directory that is very common to contain
+additional libraries is <filename
+class="directory">/usr/local/lib</filename> so we add that directory to the
+dynamic loader's search path.</para>
 
 <para>Create a new file <filename>/etc/ld.so.conf</filename> by running the
 following:</para>
@@ -16,8 +20,6 @@ following:</para>
 <para><screen><userinput>cat &gt; /etc/ld.so.conf &lt;&lt; "EOF"</userinput>
 # Begin /etc/ld.so.conf
 
-/lib
-/usr/lib
 /usr/local/lib
 
 # End /etc/ld.so.conf