Merge commit '638ecc4cde79b0296f2e04f683ca4cb881c28f36' as 'rtengine/libraw'

rtengine/libraw/COPYRIGHT

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+ ** LibRaw: Raw images processing library **
+
+Copyright (C) 2008-2021 LibRaw LLC (http://www.libraw.org, info@libraw.org)
+ 
+LibRaw is free software; you can redistribute it and/or modify
+it under the terms of the one of two licenses as you choose:
+
+1. GNU LESSER GENERAL PUBLIC LICENSE version 2.1
+   (See file LICENSE.LGPL provided in LibRaw distribution archive for details).
+
+2. COMMON DEVELOPMENT AND DISTRIBUTION LICENSE (CDDL) Version 1.0
+   (See file LICENSE.CDDL provided in LibRaw distribution archive for details).
+
+LibRaw uses code from dcraw.c -- Dave Coffin's raw photo decoder,
+dcraw.c is copyright 1997-2018 by Dave Coffin, dcoffin a cybercom o net.
+LibRaw do not use RESTRICTED code from dcraw.c
+
+LibRaw uses DCB demosaic and FBDD denoise licensed under BSD-like 3-clause license
+DCB and FBDD are Copyright (C) 2010,  Jacek Gozdz (cuniek@kft.umcs.lublin.pl)
+
+LibRaw uses X3F library to unpack Foveon Files, licensed BSD-style license
+Copyright (c) 2010, Roland Karlsson (roland@proxel.se)
+All rights reserved.
+
+LibRaw uses pieces of code from Adobe DNG SDK 1.4,
+Copyright (c) 2005 Adobe Systems Incorporated, licensed under MIT license
+