www/awstats: Update to 7.7, Fixes security vulnerability

Pass MAINTAINER'ship to submitter.

Changes: http://www.awstats.org/docs/awstats_changelog.txt

PR: 225007
Submitted by: Vidar Karlsen <vidar@karlsen.tech>
MFH: 2018Q1
Security: 4055aee5-f4c6-11e7-95f2-005056925db4