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/s390-64/__longjmp.c b/sysdeps/s390/s390-64/__longjmp.c
index 5f3d6c850e..7935f2b575 100644
--- a/sysdeps/s390/s390-64/__longjmp.c
+++ b/sysdeps/s390/s390-64/__longjmp.c
@@ -1,6 +1,5 @@
 /* Copyright (C) 2001-2021 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/s390-64/add_n.S b/sysdeps/s390/s390-64/add_n.S
index 69a3b70384..685923d954 100644
--- a/sysdeps/s390/s390-64/add_n.S
+++ b/sysdeps/s390/s390-64/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) 2001-2021 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/s390-64/crti.S b/sysdeps/s390/s390-64/crti.S
index 3aa441187d..d2a63366c1 100644
--- a/sysdeps/s390/s390-64/crti.S
+++ b/sysdeps/s390/s390-64/crti.S
@@ -1,6 +1,5 @@
 /* Special .init and .fini section support for 64 bit S/390.
    Copyright (C) 2001-2021 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/s390-64/crtn.S b/sysdeps/s390/s390-64/crtn.S
index 2271f56981..5e75780549 100644
--- a/sysdeps/s390/s390-64/crtn.S
+++ b/sysdeps/s390/s390-64/crtn.S
@@ -1,6 +1,5 @@
 /* Special .init and .fini section support for 64 bit S/390.
    Copyright (C) 2001-2021 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/s390-64/dl-machine.h b/sysdeps/s390/s390-64/dl-machine.h
index 543361c836..aa9d524bac 100644
--- a/sysdeps/s390/s390-64/dl-machine.h
+++ b/sysdeps/s390/s390-64/dl-machine.h
@@ -1,7 +1,6 @@
 /* Machine-dependent ELF dynamic relocation inline functions.
    64 bit S/390 Version.
    Copyright (C) 2001-2021 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/s390-64/s390x-mcount.h b/sysdeps/s390/s390-64/s390x-mcount.h
index 30e7ceffaa..e75504e3b7 100644
--- a/sysdeps/s390/s390-64/s390x-mcount.h
+++ b/sysdeps/s390/s390-64/s390x-mcount.h
@@ -1,6 +1,5 @@
 /* 64 bit S/390-specific implementation of profiling support.
    Copyright (C) 2001-2021 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/s390-64/setjmp.S b/sysdeps/s390/s390-64/setjmp.S
index bf72a084b0..44471dfa3a 100644
--- a/sysdeps/s390/s390-64/setjmp.S
+++ b/sysdeps/s390/s390-64/setjmp.S
@@ -1,6 +1,5 @@
 /* setjmp for 64 bit S/390, ELF version.
    Copyright (C) 2001-2021 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/s390-64/start.S b/sysdeps/s390/s390-64/start.S
index 4e6526308a..a9a1e1cead 100644
--- a/sysdeps/s390/s390-64/start.S
+++ b/sysdeps/s390/s390-64/start.S
@@ -1,6 +1,5 @@
 /* Startup code compliant to the 64 bit S/390 ELF ABI.
    Copyright (C) 2001-2021 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/s390-64/strncpy-z900.S b/sysdeps/s390/s390-64/strncpy-z900.S
index 0e491702c4..56e2ee2eb7 100644
--- a/sysdeps/s390/s390-64/strncpy-z900.S
+++ b/sysdeps/s390/s390-64/strncpy-z900.S
@@ -1,7 +1,6 @@
 /* strncpy - copy at most n characters from a string from source to
    destination.  64 bit S/390 version
    Copyright (C) 2001-2021 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/s390-64/sub_n.S b/sysdeps/s390/s390-64/sub_n.S
index 02b113f5e4..a18cfa36f0 100644
--- a/sysdeps/s390/s390-64/sub_n.S
+++ b/sysdeps/s390/s390-64/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.  64 bit S/390 version.
    Copyright (C) 2001-2021 Free Software Foundation, Inc.
-   Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
    This file is part of the GNU MP Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/sysdeps/s390/s390-64/sysdep.h b/sysdeps/s390/s390-64/sysdep.h
index 136f89e8fe..b62d33394f 100644
--- a/sysdeps/s390/s390-64/sysdep.h
+++ b/sysdeps/s390/s390-64/sysdep.h
@@ -1,6 +1,5 @@
 /* Assembler macros for 64 bit S/390.
    Copyright (C) 2001-2021 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