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>

11 files changed, 0 insertions, 11 deletions

diff --git a/sysdeps/s390/s390-32/__longjmp.c b/sysdeps/s390/s390-32/__longjmp.c
index 955aaa3..0f20500 100644
--- a/sysdeps/s390/s390-32/__longjmp.c
+++ b/sysdeps/s390/s390-32/__longjmp.c
@@ -1,6 +1,5 @@
 /* Copyright (C) 2000-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
-   Contributed by Martin Schwidefsky (schwidefsky@de.ibm.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/sysdeps/s390/s390-32/add_n.S b/sysdeps/s390/s390-32/add_n.S
index d9e7ebc..6fd339b 100644
--- a/sysdeps/s390/s390-32/add_n.S
+++ b/sysdeps/s390/s390-32/add_n.S
@@ -1,7 +1,6 @@
 /* Add two limb vectors of the same length > 0 and store sum in a third
    limb vector.
    Copyright (C) 2000-2021 Free Software Foundation, Inc.
-   Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
    This file is part of the GNU MP Library.
 
    The GNU MP Library is free software; you can redistribute it and/or modify
diff --git a/sysdeps/s390/s390-32/addmul_1.S b/sysdeps/s390/s390-32/addmul_1.S
index 58f25d7b..ae9d5a9 100644
--- a/sysdeps/s390/s390-32/addmul_1.S
+++ b/sysdeps/s390/s390-32/addmul_1.S
@@ -1,7 +1,6 @@
 /* S390 __mpn_addmul_1 -- Multiply a limb vector with a limb and add
    the result to a second limb vector.
    Copyright (C) 2000-2021 Free Software Foundation, Inc.
-   Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
    This file is part of the GNU MP Library.
 
    The GNU MP Library is free software; you can redistribute it and/or modify
diff --git a/sysdeps/s390/s390-32/dl-machine.h b/sysdeps/s390/s390-32/dl-machine.h
index d0ccd69..73cc007 100644
--- a/sysdeps/s390/s390-32/dl-machine.h
+++ b/sysdeps/s390/s390-32/dl-machine.h
@@ -1,6 +1,5 @@
 /* Machine-dependent ELF dynamic relocation inline functions.  S390 Version.
    Copyright (C) 2000-2021 Free Software Foundation, Inc.
-   Contributed by Carl Pederson & Martin Schwidefsky.
    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/sysdeps/s390/s390-32/mul_1.S b/sysdeps/s390/s390-32/mul_1.S
index bec9890..a93c5a5 100644
--- a/sysdeps/s390/s390-32/mul_1.S
+++ b/sysdeps/s390/s390-32/mul_1.S
@@ -1,7 +1,6 @@
 /* __mpn_mul_1 -- Multiply a limb vector with a limb and store
    the result in a second limb vector.
    Copyright (C) 2000-2021 Free Software Foundation, Inc.
-   Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
    This file is part of the GNU MP Library.
 
    The GNU MP Library is free software; you can redistribute it and/or modify
diff --git a/sysdeps/s390/s390-32/s390-mcount.S b/sysdeps/s390/s390-32/s390-mcount.S
index 1a95b08..4289b4c 100644
--- a/sysdeps/s390/s390-32/s390-mcount.S
+++ b/sysdeps/s390/s390-32/s390-mcount.S
@@ -1,7 +1,6 @@
 /* S/390-specific implementation of profiling support.
    Copyright (C) 2000-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
-   Contributed by Martin Schwidefsky (schwidefsky@de.ibm.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/sysdeps/s390/s390-32/setjmp.S b/sysdeps/s390/s390-32/setjmp.S
index bcc1ae3..401b7df 100644
--- a/sysdeps/s390/s390-32/setjmp.S
+++ b/sysdeps/s390/s390-32/setjmp.S
@@ -1,6 +1,5 @@
 /* setjmp for s390, ELF version.
    Copyright (C) 2000-2021 Free Software Foundation, Inc.
-   Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
    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/sysdeps/s390/s390-32/start.S b/sysdeps/s390/s390-32/start.S
index b6cfa4c..211ba7a 100644
--- a/sysdeps/s390/s390-32/start.S
+++ b/sysdeps/s390/s390-32/start.S
@@ -1,6 +1,5 @@
 /* Startup code compliant to the ELF s390 ABI.
    Copyright (C) 2000-2021 Free Software Foundation, Inc.
-   Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
    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/sysdeps/s390/s390-32/strncpy-z900.S b/sysdeps/s390/s390-32/strncpy-z900.S
index b0c3fc9..0ce84e4 100644
--- a/sysdeps/s390/s390-32/strncpy-z900.S
+++ b/sysdeps/s390/s390-32/strncpy-z900.S
@@ -2,7 +2,6 @@
    destination.  For IBM S390
    This file is part of the GNU C Library.
    Copyright (C) 2000-2021 Free Software Foundation, Inc.
-   Contributed by Martin Schwidefsky (schwidefsky@de.ibm.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/sysdeps/s390/s390-32/sub_n.S b/sysdeps/s390/s390-32/sub_n.S
index ab9f0d0..d5fe253 100644
--- a/sysdeps/s390/s390-32/sub_n.S
+++ b/sysdeps/s390/s390-32/sub_n.S
@@ -1,7 +1,6 @@
 /* __mpn_sub_n -- Add two limb vectors of the same length > 0 and store
    sum in a third limb vector.
    Copyright (C) 2000-2021 Free Software Foundation, Inc.
-   Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
    This file is part of the GNU MP Library.
 
    The GNU MP Library is free software; you can redistribute it and/or modify
diff --git a/sysdeps/s390/s390-32/sysdep.h b/sysdeps/s390/s390-32/sysdep.h
index 099a95f..eb84c95 100644
--- a/sysdeps/s390/s390-32/sysdep.h
+++ b/sysdeps/s390/s390-32/sysdep.h
@@ -1,6 +1,5 @@
 /* Assembler macros for s390.
    Copyright (C) 2000-2021 Free Software Foundation, Inc.
-   Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or