[PATCH 1/3] maint: fix GPLv3 texts to use a comma instead of semicolon

See: https://www.gnu.org/licenses/gpl-3.0.html#howto
Run:
  $ git grep -l 'Foundation; either version 3' \
      | xargs sed -i '/Foundation; either version 3/ s/n; e/n, e/'

* bootstrap.conf: Adjust GPLv3 header via the above command.
* build-aux/gen-changelog.sh: Likewise.
* lib/die.h: Likewise.
---
 bootstrap.conf             | 2 +-
 build-aux/gen-changelog.sh | 2 +-
 lib/die.h                  | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/bootstrap.conf b/bootstrap.conf
index fa7e9e32..c1b861ad 100644
--- a/bootstrap.conf
+++ b/bootstrap.conf
@@ -4,7 +4,7 @@
 
 # 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 3 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/build-aux/gen-changelog.sh b/build-aux/gen-changelog.sh
index 5e8e8eac..ce119794 100755
--- a/build-aux/gen-changelog.sh
+++ b/build-aux/gen-changelog.sh
@@ -6,7 +6,7 @@
 #
 # 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 3 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/lib/die.h b/lib/die.h
index 2b3adba5..707fa680 100644
--- a/lib/die.h
+++ b/lib/die.h
@@ -3,7 +3,7 @@
 
    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, or (at your option)
+   the Free Software Foundation, either version 3, or (at your option)
    any later version.
 
    This program is distributed in the hope that it will be useful,
-- 
2.34.1