Log Message:
Update to 0.19

Upstream changes:
0.19

2018-06-11  Sam Varshavchik  <mrsam@courier-mta.com>

        * Fix cidrvalidate() checking of IPv6 addresses with a 0 word.

2016-02-13  Sam Varshavchik  <mrsam@courier-mta.com>

        * Move test.pl to t/
        Update documentation to use only reserved IP addresses.