Add small clarifications based on feedback from support list.

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@3171 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

chapter05/chapter05.xml

@@ -24,13 +24,17 @@ them to pollute the soon-to-be LFS system.</para>
 
 <para>The build instructions assume that you are using the
 <userinput>bash</userinput> shell. It is also expected that you have already
-unpacked the sources and performed a <userinput>cd</userinput> into the source
+unpacked a source package (while logged in as user <emphasis>lfs</emphasis> --
+explained shortly) and performed a <userinput>cd</userinput> into the source
 directory of a package before issuing its build commands.</para>
 
 <para>Several of the packages are patched before compilation, but only when
 the patch is needed to circumvent a problem. Often the patch is needed in
 both this and the next chapter, but sometimes in only one of them. Therefore,
-don't worry when instructions for a downloaded patch seem to be missing.</para>
+don't worry when instructions for a downloaded patch seem to be missing. When
+applying a patch you'll occasionally see a warning message about
+<emphasis>offset</emphasis> or <emphasis>fuzz</emphasis>. These warnings are
+nothing to worry about as the patch was still successfully applied.</para>
 
 <para>During the installation of most packages you will
 see all kinds of compiler warnings scroll by on your screen. These are