Merge pull request #1115 from rahkumar651991/copyright_document

Modifying the copyright documentation.

COPYRIGHT

@@ -1,5 +1,5 @@
 
- Copyright (c) 1999-2013, Juniper Networks Inc.
+ Copyright (c) 1999-2021, Juniper Networks Inc.
                2013, Jeremy Schulman
 
  All rights reserved.
@@ -18,10 +18,10 @@
    names of its contributors may be used to endorse or promote products
    derived from this software without specific prior written permission.
 
- THIS SOFTWARE IS PROVIDED BY <copyright holder> ''AS IS'' AND ANY
+ THIS SOFTWARE IS PROVIDED BY Juniper Networks Inc. ''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 <copyright holder> BE LIABLE FOR ANY
+ DISCLAIMED. IN NO EVENT SHALL Juniper Networks Inc. 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