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+Flex carries the copyright used for BSD software, slightly modified
+because it originated at the Lawrence Berkeley (not Livermore!) Laboratory,
+which operates under a contract with the Department of Energy:
+
+ Copyright (c) 1990 The Regents of the University of California.
+ All rights reserved.
+
+ This code is derived from software contributed to Berkeley by
+ Vern Paxson.
+
+ The United States Government has rights in this work pursuant
+ to contract no. DE-AC03-76SF00098 between the United States
+ Department of Energy and the University of California.
+
+ Redistribution and use in source and binary forms with or without
+ modification are permitted provided that: (1) source distributions
+ retain this entire copyright notice and comment, and (2)
+ distributions including binaries display the following
+ acknowledgement: ``This product includes software developed by the
+ University of California, Berkeley and its contributors'' in the
+ documentation or other materials provided with the distribution and
+ in all advertising materials mentioning features or use of this
+ software. Neither the name of the University nor the names of its
+ contributors may be used to endorse or promote products derived
+ from this software without specific prior written permission.
+
+ THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ PURPOSE.
+
+This basically says "do whatever you please with this software except
+remove this notice or take advantage of the University's (or the flex
+authors') name".
+
+Note that the "flex.skl" scanner skeleton carries no copyright notice.
+You are free to do whatever you please with scanners generated using flex;
+for them, you are not even bound by the above copyright.