update copyright notice / whitespace

doc/xsl/arm-param.xsl

 <?xml version='1.0' encoding="iso-8859-1"?>
 <!--
- - Copyright (C) 2015, 2016  Internet Systems Consortium, Inc. ("ISC")
+ - Copyright (C) 2015, 2016, 2018  Internet Systems Consortium, Inc. ("ISC")
  -
  - This Source Code Form is subject to the terms of the Mozilla Public
  - License, v. 2.0. If a copy of the MPL was not distributed with this

lib/isc/unix/socket.c

 /*
- * Copyright (C) 1998-2017  Internet Systems Consortium, Inc. ("ISC")
+ * Copyright (C) 1998-2018  Internet Systems Consortium, Inc. ("ISC")
  *
  * This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this