#!/usr/bin/perl -w
+#
+# parse-debug - program for helping debug board layout parser
+#
+# Copyright (C) 2019 Ian Jackson
+#
+# This program is dual licensed, GPv3+ or CC-BY-SA 4.0+.
+# Only to the Pandemic Rising Tide folks, it is permissively licensed.
+#
+# 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 your option)
+# any later version; or (at your option), under the terms of the
+# Creative Commons Attribution-ShareAlike International License,
+# version 4.0 of that License, or (at your option), any later
+# version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+# General Public License Creative Commons Attribution-ShareAlike
+# License or the for more details.
+#
+# You should have received a copy of these licenses along with this
+# program. If not, see <https://www.gnu.org/licenses/> and
+# <https://creativecommons.org/licenses/>.
+#
+# Pandemic and Pandemic Rising Tide are (I think) trademarks of Z-Man
+# games and I use them without permission.
+#
+# For the avoidance of doubt, I do not consider this program to be a
+# derivative work of the game Pandemic Rising Tide. However, it is
+# not very useful without a pair of game description files and the
+# only nontrivial game description files I know of are indeed such
+# derivatives.
+
use strict;
use Carp;