ports/176531: www/linkchecker: Update to version 8.4

[edwin at FreeBSD.org]

Synopsis: www/linkchecker: Update to version 8.4

Responsible-Changed-From-To: freebsd-ports-bugs->araujo
Responsible-Changed-By: edwin
Responsible-Changed-When: Thu Feb 28 18:10:33 UTC 2013
Responsible-Changed-Why: 
araujo@ wants this submitter's PRs (via the GNATS Auto Assign Tool)

http://www.freebsd.org/cgi/query-pr.cgi?pr=176531