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>

9 files changed, 0 insertions, 9 deletions

diff --git a/sysdeps/mach/hurd/hp-timing.h b/sysdeps/mach/hurd/hp-timing.h
index 8904261..3a98c35 100644
--- a/sysdeps/mach/hurd/hp-timing.h
+++ b/sysdeps/mach/hurd/hp-timing.h
@@ -1,7 +1,6 @@
 /* High precision, low overhead timing functions.  Generic version.
    Copyright (C) 1998-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
-   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
 
    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/sysdeps/mach/hurd/i386/getcontext.S b/sysdeps/mach/hurd/i386/getcontext.S
index 940176d..f4f7a33 100644
--- a/sysdeps/mach/hurd/i386/getcontext.S
+++ b/sysdeps/mach/hurd/i386/getcontext.S
@@ -1,7 +1,6 @@
 /* Save current context.
    Copyright (C) 2001-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
-   Contributed by Ulrich Drepper <drepper@redhat.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/sysdeps/mach/hurd/i386/makecontext.S b/sysdeps/mach/hurd/i386/makecontext.S
index 33c9660..60d2128 100644
--- a/sysdeps/mach/hurd/i386/makecontext.S
+++ b/sysdeps/mach/hurd/i386/makecontext.S
@@ -1,7 +1,6 @@
 /* Create new context.
    Copyright (C) 2001-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
-   Contributed by Ulrich Drepper <drepper@redhat.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/sysdeps/mach/hurd/i386/setcontext.S b/sysdeps/mach/hurd/i386/setcontext.S
index 99995d6..faa6b91 100644
--- a/sysdeps/mach/hurd/i386/setcontext.S
+++ b/sysdeps/mach/hurd/i386/setcontext.S
@@ -1,7 +1,6 @@
 /* Install given context.
    Copyright (C) 2001-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
-   Contributed by Ulrich Drepper <drepper@redhat.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/sysdeps/mach/hurd/i386/swapcontext.S b/sysdeps/mach/hurd/i386/swapcontext.S
index 84eaecf..7051c3a 100644
--- a/sysdeps/mach/hurd/i386/swapcontext.S
+++ b/sysdeps/mach/hurd/i386/swapcontext.S
@@ -1,7 +1,6 @@
 /* Save current context and install the given one.
    Copyright (C) 2001-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
-   Contributed by Ulrich Drepper <drepper@redhat.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/sysdeps/mach/hurd/ifreq.h b/sysdeps/mach/hurd/ifreq.h
index 0152693..a508881 100644
--- a/sysdeps/mach/hurd/ifreq.h
+++ b/sysdeps/mach/hurd/ifreq.h
@@ -1,6 +1,5 @@
 /* Copyright (C) 1999-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
-   Contributed by Andreas Jaeger <aj@suse.de>.
 
    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/sysdeps/mach/hurd/net/if_arp.h b/sysdeps/mach/hurd/net/if_arp.h
index 330499d..b4b0aae 100644
--- a/sysdeps/mach/hurd/net/if_arp.h
+++ b/sysdeps/mach/hurd/net/if_arp.h
@@ -1,7 +1,6 @@
 /* Definitions for Address Resolution Protocol.
    Copyright (C) 1997-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
-   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
 
    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/sysdeps/mach/hurd/not-cancel.h b/sysdeps/mach/hurd/not-cancel.h
index cd320cb..507ee70 100644
--- a/sysdeps/mach/hurd/not-cancel.h
+++ b/sysdeps/mach/hurd/not-cancel.h
@@ -1,7 +1,6 @@
 /* Uncancelable versions of cancelable interfaces.  Hurd version.
    Copyright (C) 2003-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
-   Contributed by Ulrich Drepper <drepper@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/sysdeps/mach/hurd/waitid.c b/sysdeps/mach/hurd/waitid.c
index cb6f580..5f40714 100644
--- a/sysdeps/mach/hurd/waitid.c
+++ b/sysdeps/mach/hurd/waitid.c
@@ -1,7 +1,6 @@
 /* Implementation of waitid.  Hurd version.
    Copyright (C) 1997-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
-   Contributed by Zack Weinberg <zack@rabi.phys.columbia.edu>, 1997.
 
    The GNU C Library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public