update copyright headers and email addresses

In the future, it should be possible to use this:

    git ls-files | UPDATE_COPYRIGHT_HOLDER='all contributors' \
      UPDATE_COPYRIGHT_USE_INTERVALS=2 \
      xargs /path/to/gnulib/build-aux/update-copyright

1 files changed, 1 insertions, 1 deletions

diff --git a/t/config.t b/t/config.t
index d4700fc9..88ed62a4 100644
--- a/t/config.t
+++ b/t/config.t
@@ -1,4 +1,4 @@
-# Copyright (C) 2014, Eric Wong <normalperson@yhbt.net> and all contributors
+# Copyright (C) 2014-2015 all contributors <meta@public-inbox.org>
 # License: AGPLv3 or later (https://www.gnu.org/licenses/agpl-3.0.txt)
 use strict;
 use warnings;