ZP-1187 Mail/sendmail.php: PEAR bug 21082: Use BSD license

This fixes a discrepancy in the licensing of the Mail package. In PEAR
bug #15620 the license was changed from PHP 2.02 to the BSD-2-clause,
but somehow the license in sendmail.php wasn't changed. A new bug was
opened for this: PEAR bug #21082. Permission for the license change
was given by the authors in both bug #15620 and #21082.

Released under the Affero GNU General Public License (AGPL) version 3.

src/backend/imap/Mail/sendmail.php

 <?php
-//
-// +----------------------------------------------------------------------+
-// | PHP Version 5                                                        |
-// +----------------------------------------------------------------------+
-// | Copyright (c) 1997-2003 The PHP Group                                |
-// +----------------------------------------------------------------------+
-// | This source file is subject to version 2.02 of the PHP license,      |
-// | that is bundled with this package in the file LICENSE, and is        |
-// | available at through the world-wide-web at                           |
-// | http://www.php.net/license/2_02.txt.                                 |
-// | If you did not receive a copy of the PHP license and are unable to   |
-// | obtain it through the world-wide-web, please send a note to          |
-// | license@php.net so we can mail you a copy immediately.               |
-// +----------------------------------------------------------------------+
-// | Author: Chuck Hagenbuch <chuck@horde.org>                            |
-// +----------------------------------------------------------------------+
+/**
+ * Sendmail implementation of the PEAR Mail interface.
+ *
+ * PHP version 5
+ *
+ * LICENSE:
+ *
+ * Copyright (c) 2010, Chuck Hagenbuch
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * o Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * o Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * o The names of the authors 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 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * @category    Mail
+ * @package     Mail
+ * @author      Jon Parise <jon@php.net>
+ * @author      Chuck Hagenbuch <chuck@horde.org>
+ * @copyright   2010 Chuck Hagenbuch
+ * @license     http://opensource.org/licenses/bsd-license.php New BSD License
+ * @version     CVS: $Id$
+ * @link        http://pear.php.net/package/Mail/
+ */
 
 /**
  * Z-Push changes