pdftk - Files - Sun confidential code

"
Description of problem:
The following files in the pdftk tarball:
com/lowagie/text/pdf/codec/postscript/PACommand.java
com/lowagie/text/pdf/codec/postscript/PAContext.java
com/lowagie/text/pdf/codec/postscript/PAEngine.java
com/lowagie/text/pdf/codec/postscript/PAPencil.java
com/lowagie/text/pdf/codec/postscript/PAToken.java
com/lowagie/text/pdf/codec/postscript/PainterException.java

(which originate in itext) contain code with the following copyright header:
/*
* Copyright 1998 by Sun Microsystems, Inc.,
* 901 San Antonio Road, Palo Alto, California, 94303, U.S.A.
* All rights reserved.
*
* This software is the confidential and proprietary information
* of Sun Microsystems, Inc. ("Confidential Information"). You
* shall not disclose such Confidential Information and shall use
* it only in accordance with the terms of the license agreement
* you entered into with Sun.
*/
"
-> https://bugzilla.redhat.com/show_bug.cgi?id=236310#c0

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Correction: The files are all in the java_libs subdirectory, i.e.:
java_libs/com/lowagie/text/pdf/codec/postscript/PACommand.java
java_libs/com/lowagie/text/pdf/codec/postscript/PAContext.java
java_libs/com/lowagie/text/pdf/codec/postscript/PAEngine.java
java_libs/com/lowagie/text/pdf/codec/postscript/PAPencil.java
java_libs/com/lowagie/text/pdf/codec/postscript/PAToken.java
java_libs/com/lowagie/text/pdf/codec/postscript/PainterException.java
"
-> https://bugzilla.redhat.com/show_bug.cgi?id=236310#c1

-> http://archive.trisquel.info/trisquel/pool/extras/p/pdftk/pdftk_1.41.orig.tar.gz

-> https://bugs.launchpad.net/ubuntu/+source/pdftk/+bug/384515