Change usage of pipe to comma in UserEvent docs.

Change the example usage of pipe as a separator to comma in the UserEvent
documentation.

(closes issue #16961)
Reported by: jlpedrosa

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@253345 65c4cc65-6c06-0410-ace0-fbb531ad65f3

apps/app_userevent.c

@@ -43,7 +43,7 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
 			<para>Sends an arbitrary event to the manager interface, with an optional
 			<replaceable>body</replaceable> representing additional arguments. The
 			<replaceable>body</replaceable> may be specified as
-			a <literal>|</literal> delimited list of headers. Each additional
+			a <literal>,</literal> delimited list of headers. Each additional
 			argument will be placed on a new line in the event. The format of the
 			event will be:</para>
 			<para>    Event: UserEvent</para>