8.3 Building and Installing a Custom Kernel

- Reemphasise the need of full source set for 'make buildkernel'

PR:		docs/75864 (inspired by)
Submitted by:	Eli K. Breen <eli@gopostal.ca>
Approved by:	keramida (mentor)

en_US.ISO8859-1/books/handbook/kernelconfig/chapter.sgml

@@ -368,6 +368,12 @@
       </step>
     </procedure>
     
+    <note>
+      <para>This method of kernel building requires full source files.  If you
+	only installed the kernel source, use the traditional method, as
+	described above.</para>
+    </note>
+
     <note>
       <para>In &os;&nbsp;4.2 and older you must replace
         <literal>KERNCONF=</literal> with <literal>KERNEL=</literal>.