Extracted from doc/README
--- /dev/null	2020-07-04 07:25:57.571395009 +0200
+++ ./LICENSE	2020-07-06 08:48:06.012316718 +0200
@@ -0,0 +1,11 @@
+(C) Copyright 1994-2002 by Akinori Ito
+(C) Copyright 2002-2011 by Akinori Ito, Hironori Sakamoto, Fumitoshi Ukai
+
+Use, modification and redistribution of this software is hereby granted, 
+provided that this entire copyright notice is included on any copies of 
+this software and applications and derivations thereof.
+
+This software is provided on an "as is" basis, without warranty of any
+kind, either expressed or implied, as to any matter including, but not
+limited to warranty of fitness of purpose, or merchantability, or
+results obtained from use of this software.