Clarify COPYING

COPYING

@@ -1,5 +1,9 @@
-
-/*
+ * Original author:  Roland Schemers  <schemers@stanford.edu>
+ * IPv6 Support:     Jeroen Massar    <jeroen@unfix.org / jeroen@ipng.nl>
+ * Improved main loop: David Schweikert <david@schweikert.ch>
+ * Debian Merge, TOS settings: Tobi Oetiker <tobi@oetiker.ch>
+ * Bugfixes, byte order & senseful seq.-numbers: Stephan Fuhrmann (stephan.fuhrmann AT 1und1.de)
+ *
  * Redistribution and use in source and binary forms are permitted
  * provided that the above copyright notice and this paragraph are
  * duplicated in all such forms and that any documentation,
@@ -11,5 +15,3 @@
  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
- */
-