Fixed sample file as -p is now used instead of -l

packages/etc/n2n/supernode.conf.sample

@@ -1,10 +1,10 @@
 #
 #        The configuration file is similar to the command line, with one option per line. An equal
-#        sign '=' should be used between key and value. Example: -l=7777 or --local-port=7777
+#        sign '=' should be used between key and value. Example: -p=7777
 #        This file contains a basic configuration example, please refer to the help (-h) for the full
 #        list of available options.
 #
-#       -l|--local-port
+#       -p
 #        Sets the UDP listening port. 
 #
 # -l=7777