Provide the mod_footer.pl.in with a copyright header and explanation.

While there, also clean up some idiosyncratic use of CORE::say: we use
print everywhere else in PERL scripts, so do the same here.

diff --git a/doc/doxygen/scripts/mod_footer.pl.in b/doc/doxygen/scripts/mod_footer.pl.in
index 7eeda73f5134c1bdd682190f9bdd45fe55301fa1..b3ddb6beba6fee02f3f34c639c7e4f2008ff6cc5 100644 (file)
--- a/doc/doxygen/scripts/mod_footer.pl.in
+++ b/doc/doxygen/scripts/mod_footer.pl.in
@@ -1,3 +1,22 @@
+## ---------------------------------------------------------------------
+##
+## Copyright (C) 2014 - 2018 by the deal.II authors
+##
+## This file is part of the deal.II library.
+##
+## The deal.II library is free software; you can use it, redistribute
+## it, and/or modify it under the terms of the GNU Lesser General
+## Public License as published by the Free Software Foundation; either
+## version 2.1 of the License, or (at your option) any later version.
+## The full text of the license can be found in the file LICENSE.md at
+## the top level directory of deal.II.
+##
+## ---------------------------------------------------------------------
+
+#
+# A PERL script that modifies the default-generated 'footer.html' file
+# that doxygen provides for us and customizes it for our needs.
+#
 
 use Sys::Hostname;
 my $host = hostname;