Fix blank lines in DEBIAN/copyright license texts.

contrib/DEBIAN/copyright

@@ -120,14 +120,14 @@ License: Boost-Software-License-1.0
  execute, and transmit the Software, and to prepare derivative works of the
  Software, and to permit third-parties to whom the Software is furnished to
  do so, all subject to the following:
-
+ .
  The copyright notices in the Software and this entire statement, including
  the above license grant, this restriction and the following disclaimer,
  must be included in all copies of the Software, in whole or in part, and
  all derivative works of the Software, unless such copies or derivative
  works are solely in the form of machine-executable object code generated by
  a source language processor.
-
+ .
  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
@@ -262,10 +262,10 @@ License: OpenSSL+SSLeay
  The OpenSSL toolkit stays under a dual license, i.e. both the conditions of
  the OpenSSL License and the original SSLeay license apply to the toolkit.
  See below for the actual license texts.
-
+ .
  OpenSSL License
  ---------------
-
+ .
  /* ====================================================================
  * Copyright (c) 1998-2016 The OpenSSL Project.  All rights reserved.
  *
@@ -319,10 +319,10 @@ License: OpenSSL+SSLeay
  * Hudson (tjh@cryptsoft.com).
  *
  */
-
+ .
  Original SSLeay License
  -----------------------
-
+ .
  /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -383,7 +383,7 @@ License: OpenSSL+SSLeay
 License: BSD-3clause
  Redistribution and use in source and binary forms, with or without
  modification, are permitted provided that the following conditions are met:
-
+ .
  * Redistributions of source code must retain the above copyright notice,
  this list of conditions and the following disclaimer.
  * Redistributions in binary form must reproduce the above copyright notice,
@@ -391,7 +391,7 @@ License: BSD-3clause
  and/or other materials provided with the distribution.
  * The name of the author may not be used to endorse or promote products
  derived from this software without specific prior written permission.
-
+ .
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE