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RISC OS: update Iconv licensing information

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Files: *
Copyright: 2004-13 J-M Bell
License: MIT-like
Files: src/transtab
Copyright: 2000 Markus Kuhn
License: transtab
Files: test/GNU/*
Copyright: 2000-2002, 2004-2005 Free Software Foundation, Inc.
License: LGPL-2+
Files: unicode/Unicode/*
Copyright:
1997 Acorn Computers Ltd
1999, 2001 Pace Micro Technology plc
License: Apache-2.0
Files: unicode/Unicode/c/makealiases
Copyright: 2008 John-Mark Bell
License: MIT-like
Files: unicode/Unicode/data/CharNames
Copyright: 2002 Unicode, Inc
License: Unicode
Files: unicode/UnicodeLib/*
Copyright:
1997, 1998 Acorn Computers Ltd
1997-2000 Pace Micro Technology PLC.
1999 Element 14 Ltd
2005, 2009, 2015 Castle Technology Ltd
License: Apache-2.0
Files: unicode/UnicodeLib/data/*
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1991-2002 Unicode, Inc.
License: Unicode
License: Apache-2.0
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License: transtab
This package contains a table for transliterating ISO 10646 texts into
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Licence
=======
Iconv is Copyright © 2004-13 J-M Bell
Permission is hereby granted, free of charge, to any person obtaining a copy
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Please see the COPYING file for full licensing information. No part of the
test suite is included in this binary distribution.

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END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Libraries
If you develop a new library, and you want it to be of the greatest
possible use to the public, we recommend making it free software that
everyone can redistribute and change. You can do so by permitting
redistribution under these terms (or, alternatively, under the terms of the
ordinary General Public License).
To apply these terms, attach the following notices to the library. It is
safest to attach them to the start of each source file to most effectively
convey the exclusion of warranty; and each file should have at least the
"copyright" line and a pointer to where the full notice is found.
<one line to give the library's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
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Also add information on how to contact you by electronic and paper mail.
You should also get your employer (if you work as a programmer) or your
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necessary. Here is a sample; alter the names:
Yoyodyne, Inc., hereby disclaims all copyright interest in the
library `Frob' (a library for tweaking knobs) written by James Random Hacker.
<signature of Ty Coon>, 1 April 1990
Ty Coon, President of Vice
That's all there is to it!