Copyright for libpqtypes source package in Focal

This package was debianized by Christoph Berg  on 2014-08-15.

Upstream: http://libpqtypes.esilo.com/

Software extension to the PostgreSQL libpq interface.

Copyright (c) 2009, 2011 eSilo, LLC. All rights reserved.

Permission to use, copy, modify, and distribute this software and its
documentation for any purpose, without fee, and without a written agreement
is hereby granted, provided that the above copyright notice and this
paragraph and the following two paragraphs appear in all copies.

IN NO EVENT SHALL ESILO, LLC. BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT,
SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS,
ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
ESILO, LLC. HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

ESILO, LLC. SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS ON AN "AS IS" BASIS,
AND ESILO, LLC. HAS NO OBLIGATIONS TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, 
ENHANCEMENTS, OR MODIFICATIONS.

The Debian packaging is licensed under the same terms.