www/fcgiwrap: fix IPv6 support

Extend existing patch to fix IPv6 support.
Bump PORTREVISION

The fix zero-out the sockaddr structure before
using it as a sockaddr_in6 structure as explained
by IEEE Std 1003.1.

The patch was upstremed : https://github.com/gnosek/fcgiwrap/pull/51

PR: 243721
Reported by: <olaf@zaplinski.de>