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Copyright (C) 2007, 2008, 2009, 2010 Karl Berry.

Copyright (C) 1988, 1994, 2007 Stephen Gilmore.

Copyright (C) 1994, 1995, 1996 Torsten Martinsen.

Permission is granted to make and distribute verbatim copies of this manual
provided the copyright notice and this permission notice are preserved on
all copies.

Permission is granted to copy and distribute modified versions of this manual
under the conditions for verbatim copying, provided that the entire resulting
derived work is distributed under the terms of a permission notice identical
to this one.

Permission is granted to copy and distribute translations of this manual into
another language, under the above conditions for modified versions.