doc: add argument information for socket.destroy()

PR-URL: https://github.com/nodejs/node/pull/7238
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Fedor Indutny <fedor.indutny@gmail.com>
Reviewed-By: Johan Bergström <bugs@bergstroem.nu>

doc/api/net.md

@@ -512,7 +512,7 @@ If `true` - [`socket.connect(options[, connectListener])`][`socket.connect(optio
 haven't yet finished. Will be set to `false` before emitting `connect` event
 and/or calling [`socket.connect(options[, connectListener])`][`socket.connect(options, connectListener)`]'s callback.
 
-### socket.destroy()
+### socket.destroy([exception])
 <!-- YAML
 added: v0.1.90
 -->
@@ -520,6 +520,9 @@ added: v0.1.90
 Ensures that no more I/O activity happens on this socket. Only necessary in
 case of errors (parse error or so).
 
+If `exception` is specified, an [`'error'`][] event will be emitted and any
+listeners for that event will receive `exception` as an argument.
+
 ### socket.destroyed
 
 A Boolean value that indicates if the connection is destroyed or not. Once a