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>

12 files changed, 0 insertions, 12 deletions

diff --git a/io/bug-ftw1.c b/io/bug-ftw1.c
index 061b02779e..6ca0c18dc8 100644
--- a/io/bug-ftw1.c
+++ b/io/bug-ftw1.c
@@ -1,7 +1,6 @@
 /* Test for ftw function searching in root directory.
    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/io/bug-ftw2.c b/io/bug-ftw2.c
index 174366fd4e..4b3726b421 100644
--- a/io/bug-ftw2.c
+++ b/io/bug-ftw2.c
@@ -1,7 +1,6 @@
 /* Test for ftw function searching in current directory.
    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/io/bug-ftw4.c b/io/bug-ftw4.c
index 7ae26ed263..418f976384 100644
--- a/io/bug-ftw4.c
+++ b/io/bug-ftw4.c
@@ -1,7 +1,6 @@
 /* Test if ftw function doesn't leak fds.
    Copyright (C) 2003-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
-   Contributed by Jakub Jelinek <jakub@redhat.com>, 2003.
 
    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/io/ftw.c b/io/ftw.c
index ce1c6a14a3..f0db173727 100644
--- a/io/ftw.c
+++ b/io/ftw.c
@@ -1,7 +1,6 @@
 /* File tree walker functions.
    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/io/ftw64-time64.c b/io/ftw64-time64.c
index 7c9db5448a..b31a3682e7 100644
--- a/io/ftw64-time64.c
+++ b/io/ftw64-time64.c
@@ -1,7 +1,6 @@
 /* File tree walker functions.  LFS version.
    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/io/ftw64.c b/io/ftw64.c
index b2150c42a4..f1cf186abe 100644
--- a/io/ftw64.c
+++ b/io/ftw64.c
@@ -1,7 +1,6 @@
 /* File tree walker functions.  LFS version.
    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/io/ppoll.c b/io/ppoll.c
index 8aa107aee6..5e53cbc5ca 100644
--- a/io/ppoll.c
+++ b/io/ppoll.c
@@ -1,6 +1,5 @@
 /* Copyright (C) 2006-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
-   Contributed by Ulrich Drepper <drepper@redhat.com>, 2006.
 
    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/io/test-lfs.c b/io/test-lfs.c
index 68aec90b80..2a7c43e6f8 100644
--- a/io/test-lfs.c
+++ b/io/test-lfs.c
@@ -1,7 +1,6 @@
 /* Some basic tests for LFS.
    Copyright (C) 2000-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
-   Contributed by Andreas Jaeger <aj@suse.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/io/test-stat.c b/io/test-stat.c
index 32b2bd25d5..212801babf 100644
--- a/io/test-stat.c
+++ b/io/test-stat.c
@@ -1,5 +1,4 @@
 /* Copyright (C) 2000-2021 Free Software Foundation, Inc.
-   Contributed by Maciej W. Rozycki <macro@ds2.pg.gda.pl>, 2000.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/io/test-stat2.c b/io/test-stat2.c
index 1d5938df23..e0e7cc0893 100644
--- a/io/test-stat2.c
+++ b/io/test-stat2.c
@@ -1,7 +1,6 @@
 /* Test consistence of results of stat and stat64.
    Copyright (C) 2000-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
-   Contributed by Ulrich Drepper <drepper@redhat.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/io/tst-fcntl.c b/io/tst-fcntl.c
index fe7ca18a42..24d45904d2 100644
--- a/io/tst-fcntl.c
+++ b/io/tst-fcntl.c
@@ -1,7 +1,6 @@
 /* Tests for fcntl.
    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/io/tst-getcwd.c b/io/tst-getcwd.c
index fa60f982e3..5572446403 100644
--- a/io/tst-getcwd.c
+++ b/io/tst-getcwd.c
@@ -1,7 +1,6 @@
 /* Test of getcwd function.
    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