Merge from Gnulib

This incorporates:
2018-01-05 maint: Add encoding marker for Emacs to non-ASCII sources
2018-01-04 update-copyright: Handle use of ©
2018-01-04 pthread_sigmask: Avoid compilation error on mingw
2018-01-02 stat-time: silence -Wunused-parameter regression
* build-aux/config.guess, build-aux/config.sub:
* build-aux/update-copyright, doc/misc/texinfo.tex, lib/gnulib.mk.in:
* lib/md5.c, lib/md5.h, lib/sha1.c, lib/sha1.h, lib/sha256.c:
* lib/sha256.h, lib/sha512.c, lib/sha512.h, lib/signal.in.h:
* lib/stat-time.h: Copy from Gnulib, or regenerate.

1 files changed, 4 insertions, 1 deletions

diff --git a/doc/misc/texinfo.tex b/doc/misc/texinfo.tex
index b0179d6b007..1987c50ba26 100644
--- a/doc/misc/texinfo.tex
+++ b/doc/misc/texinfo.tex
@@ -5,7 +5,10 @@
 %
 \def\texinfoversion{2017-12-26.21}
 %
-% Copyright 1985-1986, 1988, 1990-2018 Free Software Foundation, Inc.
+% Copyright 1985, 1986, 1988, 1990, 1991, 1992, 1993, 1994, 1995,
+% 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
+% 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017
+% Free Software Foundation, Inc.
 %
 % This texinfo.tex file is free software: you can redistribute it and/or
 % modify it under the terms of the GNU General Public License as