Merged revisions 314732 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.8

........
  r314732 | rmudgett | 2011-04-21 17:38:44 -0500 (Thu, 21 Apr 2011) | 1 line
  
  Correct DAHDIShowChannels XML documentation.
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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@314733 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_dahdi.c

@@ -235,7 +235,9 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
 		</synopsis>
 		<syntax>
 			<xi:include xpointer="xpointer(/docs/manager[@name='Login']/syntax/parameter[@name='ActionID'])" />
-			<parameter name="DAHDIChannel" required="true" />
+			<parameter name="DAHDIChannel">
+				<para>Specify the specific channel to show.  Show all channels if zero or not present.</para>
+			</parameter>
 		</syntax>
 		<description>
 		</description>