[balsa] Relicense some files as GPLv2+

[Peter Bloomfield <peterb src gnome org>]

commit e12bbdb31b3d9f7cb356503ec6d8e76163712a48
Author: Peter Bloomfield <PeterBloomfield bellsouth net>
Date:   Sun Feb 16 14:58:14 2020 -0500

    Relicense some files as GPLv2+
    
    and update copyright dates and other details.
    
    modified:   libbalsa/application-helpers.c
    modified:   libbalsa/application-helpers.h
    modified:   libbalsa/completion.c
    modified:   libbalsa/completion.h

 libbalsa/application-helpers.c | 4 ++--
 libbalsa/application-helpers.h | 4 ++--
 libbalsa/completion.c          | 5 ++---
 libbalsa/completion.h          | 5 ++---
 4 files changed, 8 insertions(+), 10 deletions(-)
---
diff --git a/libbalsa/application-helpers.c b/libbalsa/application-helpers.c
index 65aa25f03..53039cb64 100644
--- a/libbalsa/application-helpers.c
+++ b/libbalsa/application-helpers.c
@@ -1,10 +1,10 @@
 /* -*-mode:c; c-style:k&r; c-basic-offset:4; -*- */
 /* Balsa E-Mail Client
- * Copyright (C) 1998-2016 Stuart Parmenter and others, see AUTHORS file.
+ * Copyright (C) 2013-2020 Peter Bloomfield
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
+ * the Free Software Foundation, either version 2 of the License, or
  * (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
diff --git a/libbalsa/application-helpers.h b/libbalsa/application-helpers.h
index 088bac582..9e07c30a7 100644
--- a/libbalsa/application-helpers.h
+++ b/libbalsa/application-helpers.h
@@ -1,10 +1,10 @@
 /* -*-mode:c; c-style:k&r; c-basic-offset:4; -*- */
 /* Balsa E-Mail Client
- * Copyright (C) 1998-2016 Stuart Parmenter and others, see AUTHORS file.
+ * Copyright (C) 2013-2020 Peter Bloomfield
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
+ * the Free Software Foundation, either version 2 of the License, or
  * (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
diff --git a/libbalsa/completion.c b/libbalsa/completion.c
index 81500bda4..8c9997bca 100644
--- a/libbalsa/completion.c
+++ b/libbalsa/completion.c
@@ -1,12 +1,11 @@
 /* -*-mode:c; c-style:k&r; c-basic-offset:4; -*- */
 /* Balsa E-Mail Client
  *
- * Copyright (C) 1997-2016 Stuart Parmenter and others,
- *                         See the file AUTHORS for a list.
+ * Copyright (C) 1997-2020; See the file AUTHORS for a list.
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or (at
+ * the Free Software Foundation, either version 2 of the License, or (at
  * your option) any later version.
  *
  * This program is distributed in the hope that it will be useful, but
diff --git a/libbalsa/completion.h b/libbalsa/completion.h
index bd6e5af07..319d1c654 100644
--- a/libbalsa/completion.h
+++ b/libbalsa/completion.h
@@ -1,12 +1,11 @@
 /* -*-mode:c; c-style:k&r; c-basic-offset:4; -*- */
 /* Balsa E-Mail Client
  *
- * Copyright (C) 1997-2016 Stuart Parmenter and others,
- *                         See the file AUTHORS for a list.
+ * Copyright (C) 1997-2020; See the file AUTHORS for a list.
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or (at
+ * the Free Software Foundation, either version 2 of the License, or (at
  * your option) any later version.
  *
  * This program is distributed in the hope that it will be useful, but