Remove "Contributed by" lines

We stopped adding "Contributed by" or similar lines in sources in 2012
in favour of git logs and keeping the Contributors section of the
glibc manual up to date.  Removing these lines makes the license
header a bit more consistent across files and also removes the
possibility of error in attribution when license blocks or files are
copied across since the contributed-by lines don't actually reflect
reality in those cases.

Move all "Contributed by" and similar lines (Written by, Test by,
etc.) into a new file CONTRIBUTED-BY to retain record of these
contributions.  These contributors are also mentioned in
manual/contrib.texi, so we just maintain this additional record as a
courtesy to the earlier developers.

The following scripts were used to filter a list of files to edit in
place and to clean up the CONTRIBUTED-BY file respectively.  These
were not added to the glibc sources because they're not expected to be
of any use in future given that this is a one time task:

https://gist.github.com/siddhesh/b5ecac94eabfd72ed2916d6d8157e7dc
https://gist.github.com/siddhesh/15ea1f5e435ace9774f485030695ee02

Reviewed-by: Carlos O'Donell <carlos@redhat.com>

18 files changed, 0 insertions, 20 deletions

diff --git a/libio/bug-ungetc4.c b/libio/bug-ungetc4.c
index d4fa415..4ddd4ba 100644
--- a/libio/bug-ungetc4.c
+++ b/libio/bug-ungetc4.c
@@ -1,7 +1,6 @@
 /* Test program for ungetc/fseekpos interaction.
    Copyright (C) 2004-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
-   Contributed by Jakub Jelinek <jakub@redhat.com>, 2004.
 
    The GNU C Library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
diff --git a/libio/fileops.c b/libio/fileops.c
index e8ee374..0986059 100644
--- a/libio/fileops.c
+++ b/libio/fileops.c
@@ -1,6 +1,5 @@
 /* Copyright (C) 1993-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
-   Written by Per Bothner <bothner@cygnus.com>.
 
    The GNU C Library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
diff --git a/libio/iopopen.c b/libio/iopopen.c
index 6b04222..0266d19 100644
--- a/libio/iopopen.c
+++ b/libio/iopopen.c
@@ -1,6 +1,5 @@
 /* Copyright (C) 1993-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
-   Written by Per Bothner <bothner@cygnus.com>.
 
    The GNU C Library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
diff --git a/libio/libio.h b/libio/libio.h
index cebdc65..b7cfe1c 100644
--- a/libio/libio.h
+++ b/libio/libio.h
@@ -1,6 +1,5 @@
 /* Copyright (C) 1991-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
-   Written by Per Bothner <bothner@cygnus.com>.
 
    The GNU C Library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
diff --git a/libio/obprintf.c b/libio/obprintf.c
index 4333276..e0b61cc 100644
--- a/libio/obprintf.c
+++ b/libio/obprintf.c
@@ -1,7 +1,6 @@
 /* Print output of stream to given obstack.
    Copyright (C) 1996-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
-   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
 
    The GNU C Library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
diff --git a/libio/oldfileops.c b/libio/oldfileops.c
index ed3c98b..453f54b 100644
--- a/libio/oldfileops.c
+++ b/libio/oldfileops.c
@@ -1,6 +1,5 @@
 /* Copyright (C) 1993-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
-   Written by Per Bothner <bothner@cygnus.com>.
 
    The GNU C Library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
diff --git a/libio/oldfmemopen.c b/libio/oldfmemopen.c
index 6e41535..a8c14b3 100644
--- a/libio/oldfmemopen.c
+++ b/libio/oldfmemopen.c
@@ -1,7 +1,6 @@
 /* Fmemopen implementation.
    Copyright (C) 2000-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
-   Contributed by Hanno Mueller, kontakt@hanno.de, 2000.
 
    The GNU C Library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
diff --git a/libio/oldiopopen.c b/libio/oldiopopen.c
index 68ca52c..c8b52c1 100644
--- a/libio/oldiopopen.c
+++ b/libio/oldiopopen.c
@@ -1,6 +1,5 @@
 /* Copyright (C) 1998-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
-   Written by Per Bothner <bothner@cygnus.com>.
 
    The GNU C Library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
diff --git a/libio/test-fmemopen.c b/libio/test-fmemopen.c
index 7a6ffb3..a26181b 100644
--- a/libio/test-fmemopen.c
+++ b/libio/test-fmemopen.c
@@ -1,7 +1,6 @@
 /* Test for fmemopen implementation.
    Copyright (C) 2000-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
-   Contributed by Hanno Mueller, kontakt@hanno.de, 2000.
 
    The GNU C Library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
diff --git a/libio/tst-fopenloc.c b/libio/tst-fopenloc.c
index 6e417e6..f0e52e1 100644
--- a/libio/tst-fopenloc.c
+++ b/libio/tst-fopenloc.c
@@ -1,7 +1,6 @@
 /* Test for ,ccs= handling in fopen.
    Copyright (C) 2001-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
-   Contributed by Ulrich Drepper <drepper@cygnus.com>, 2001.
 
    The GNU C Library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
diff --git a/libio/tst-freopen.c b/libio/tst-freopen.c
index c8bc0a3..1aba147 100644
--- a/libio/tst-freopen.c
+++ b/libio/tst-freopen.c
@@ -1,7 +1,6 @@
 /* Test freopen with mmap stdio.
    Copyright (C) 2002-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
-   Contributed by Jakub Jelinek <jakub@redhat.com>, 2002.
 
    The GNU C Library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
diff --git a/libio/tst-mmap-setvbuf.c b/libio/tst-mmap-setvbuf.c
index aa9ed4b..816b3fc 100644
--- a/libio/tst-mmap-setvbuf.c
+++ b/libio/tst-mmap-setvbuf.c
@@ -1,7 +1,6 @@
 /* Test setvbuf on readonly fopen (using mmap stdio).
    Copyright (C) 2002-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
-   Contributed by Jakub Jelinek <jakub@redhat.com>, 2002.
 
    The GNU C Library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
diff --git a/libio/tst-widetext.c b/libio/tst-widetext.c
index 64b8f4a..2e7dfce 100644
--- a/libio/tst-widetext.c
+++ b/libio/tst-widetext.c
@@ -2,7 +2,6 @@
    amounts of text.
    Copyright (C) 2000-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
-   Contributed by Ulrich Drepper <drepper@cygnus.com>.
 
    The GNU C Library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
diff --git a/libio/tst_getwc.c b/libio/tst_getwc.c
index 420f54a..618326a 100644
--- a/libio/tst_getwc.c
+++ b/libio/tst_getwc.c
@@ -1,7 +1,6 @@
 /* Simple test of getwc in the C locale.
    Copyright (C) 2000-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
-   Contributed by Ulrich Drepper <drepper@cygnus.com>, 2000.
 
    The GNU C Library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
diff --git a/libio/tst_putwc.c b/libio/tst_putwc.c
index 2a6a4c7..1f5f982 100644
--- a/libio/tst_putwc.c
+++ b/libio/tst_putwc.c
@@ -1,7 +1,6 @@
 /* Simple test of putwc in the C locale.
    Copyright (C) 2000-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
-   Contributed by Ulrich Drepper <drepper@cygnus.com>, 2000.
 
    The GNU C Library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
diff --git a/libio/tst_wprintf2.c b/libio/tst_wprintf2.c
index dfff70f..de19ae3 100644
--- a/libio/tst_wprintf2.c
+++ b/libio/tst_wprintf2.c
@@ -1,4 +1,3 @@
-/* Test case by Yoshito Kawada <KAWADA@jp.ibm.com>.  */
 #include <errno.h>
 #include <error.h>
 #include <fcntl.h>
diff --git a/libio/wfileops.c b/libio/wfileops.c
index 37f4478..be7b8df 100644
--- a/libio/wfileops.c
+++ b/libio/wfileops.c
@@ -1,7 +1,5 @@
 /* Copyright (C) 1993-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
-   Written by Ulrich Drepper <drepper@cygnus.com>.
-   Based on the single byte version by Per Bothner <bothner@cygnus.com>.
 
    The GNU C Library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
diff --git a/libio/wgenops.c b/libio/wgenops.c
index 106ddfd..75c27b2 100644
--- a/libio/wgenops.c
+++ b/libio/wgenops.c
@@ -1,7 +1,5 @@
 /* Copyright (C) 1993-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
-   Written by Ulrich Drepper <drepper@cygnus.com>.
-   Based on the single byte version by Per Bothner <bothner@cygnus.com>.
 
    The GNU C Library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public