Add small documentation update to func_callcompletion.c.

This directs users to documents which can help explain the
concepts and configuration options settable with the function.



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@258345 65c4cc65-6c06-0410-ace0-fbb531ad65f3

funcs/func_callcompletion.c

@@ -56,7 +56,10 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
 			<para>The CALLCOMPLETION function can be used to get or set a call
 			completion configuration parameter for a channel. Note that setting
 			a configuration parameter will only change the parameter for the
-			duration of the call.</para>
+			duration of the call.
+			
+			For more information on call completion in Asterisk, see <filename>doc/tex/ccss.tex</filename>.
+			For more information on call completion parameters, see <filename>configs/ccss.conf.sample</filename>.</para>
 		</description>
 	</function>
  ***/