LICENSE in ruby-vpi-17.0.0 vs LICENSE in ruby-vpi-18.0.0

@@ -1,19 +1,21 @@
-Copyright 2006 Suraj N. Kurapati <[e-mail]>
+Copyright 2006 Suraj N. Kurapati <SNK at GNA dot ORG>
+Copyright 1999 Kazuhiro HIWADA <HIWADA at KUEE dot KYOTO-U dot AC dot JP>
 
 Permission is hereby granted, free of charge, to any person obtaining a copy of
 this software and associated documentation files (the "Software"), to deal in
 the Software without restriction, including without limitation the rights to
 use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 the Software, and to permit persons to whom the Software is furnished to do so,
 subject to the following conditions:
 
-1. All modified and unmodified copies and substantial portions of the Software
-   (the "Derivatives") and their corresponding machine-readable source code (the
-   "Code") must include the above copyright notice and this permission notice.
+1. All copies and substantial portions of the Software, whether modified or
+   unmodified, (the "Derivatives") and their corresponding machine-readable
+   source code (the "Code") must include the above copyright notice and this
+   permission notice.
 
-2. Upon distribution, the Derivatives must be accompanied either by the Code or,
-   if the Code is obtainable for no more than the cost of distribution plus a
+2. The Derivatives, upon distribution, must be accompanied by the Code or, if
+   the Code is obtainable for no more than the cost of distribution plus a
    nominal fee, by information on how to obtain the Code.
 
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR