MFH: r408580

net-mgmt/xymon-server: Update to 4.3.25

This release fixes serveral security issues.

Security: CVE-2016-2054
Security: CVE-2016-2055
Security: CVE-2016-2056
Security: CVE-2016-2057
Security: CVE-2016-2058
Security: https://vuxml.freebsd.org/freebsd/1cecd5e0-c372-11e5-96d6-14dae9d210b8.html

Approved by: ports-secteam (with hat)