AMI Docs: Fix Status channel parameter optionality

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Merged revisions 421442 from http://svn.asterisk.org/svn/asterisk/branches/1.8
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Merged revisions 421443 from http://svn.asterisk.org/svn/asterisk/branches/11
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Merged revisions 421444 from http://svn.asterisk.org/svn/asterisk/branches/12
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Merged revisions 421445 from http://svn.asterisk.org/svn/asterisk/branches/13


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@421446 65c4cc65-6c06-0410-ace0-fbb531ad65f3

main/manager.c

@@ -211,7 +211,7 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
 		</synopsis>
 		<syntax>
 			<xi:include xpointer="xpointer(/docs/manager[@name='Login']/syntax/parameter[@name='ActionID'])" />
-			<parameter name="Channel" required="true">
+			<parameter name="Channel" required="false">
 				<para>The name of the channel to query for status.</para>
 			</parameter>
 			<parameter name="Variables">