ports/185829: Update net-mgmt/nagios-plugins package upstream URL/source to https://www.monitoring-plugins.org

[linimon at FreeBSD.org]

Old Synopsis: Update nagios-plugins package upstream URL/source to https://www.monitoring-plugins.org
New Synopsis: Update net-mgmt/nagios-plugins package upstream URL/source to https://www.monitoring-plugins.org

Responsible-Changed-From-To: freebsd-bugs->freebsd-ports-bugs
Responsible-Changed-By: linimon
Responsible-Changed-When: Thu Jan 16 23:02:50 UTC 2014
Responsible-Changed-Why: 
ports PR.

http://www.freebsd.org/cgi/query-pr.cgi?pr=185829