Fix up linktrace event parsing and documentation so that they are in sync

tbsetup/ns2ir/sim.tcl.in

@@ -368,6 +368,7 @@ Simulator instproc run {} {
     var_import ::GLOBALS::elabinelab_eid
     var_import ::GLOBALS::elabinelab_cvstag
     var_import ::GLOBALS::security_level
+    var_import ::GLOBALS::sourcefile_list
     
     if {$ran == 1} {
 	perror "The Simulator 'run' statement can only be run once."
@@ -617,6 +618,10 @@ Simulator instproc run {} {
 	$self spitxml_data "eventlist" [list "time" "vnode" "vname" "objecttype" "eventtype" "arguments" "atstring" ] [list [lindex $event 0] [lindex $event 1] [lindex $event 2] $objtypes([lindex $event 3]) $eventtypes([lindex $event 4]) [lindex $event 5] [lindex $event 6] ]
     }
 
+    foreach sourcefile $sourcefile_list {
+	$self spitxml_data "external_sourcefiles" [list "pathname"] [list $sourcefile]
+    }
+
     $self spitxml_finish
 }
 
@@ -1223,10 +1228,14 @@ Simulator instproc make_event {outer event} {
 		    set action [lindex $event 2]
 
 		    switch -- $action {
-			"pause"	    {set etype STOP}
-			"restart"   {set etype START}
+			"stop"	    {set etype STOP}
+			"start"     {set etype START}
 			"kill"	    {set etype KILL}
 			"snapshot"  {set etype SNAPSHOT}
+			unknown {
+			    punsup "at $time $event"
+			    return
+			}
 		    }
 		}
 		unknown {
@@ -1361,10 +1370,14 @@ Simulator instproc make_event {outer event} {
 		    set action [lindex $event 2]
 
 		    switch -- $action {
-			"pause"	    {set etype STOP}
-			"restart"   {set etype START}
+			"stop"	    {set etype STOP}
+			"start"     {set etype START}
 			"kill"	    {set etype KILL}
 			"snapshot"  {set etype SNAPSHOT}
+			unknown {
+			    punsup "at $time $event"
+			    return
+			}
 		    }
 		}
 		unknown {

www/tutorial/advanced.html

@@ -670,9 +670,9 @@ events. For example, to tell the packet capture processes monitoring
 And of course, you may use the NS "at" syntax to schedule static
 events from your NS file:
 	<code><pre>
-	$ns at 10 "$link0 stop"
-	$ns at 20 "$link0 start"
-	$ns at 30 "$link0 snapshot"</pre></code>
+	$ns at 10 "$link0 trace stop"
+	$ns at 20 "$link0 trace start"
+	$ns at 30 "$link0 trace snapshot"</pre></code>
 
 <br>
 The output files that the capture process create, are stored in