Repocopy from net-mgmt/cacti (r416066) -> net-mgmt/cacti88

Web-driven graphing interface for RRDTool (Old version of net-mgmt/cacti)

New releases of Cacti are still unable to work with useful plugins like
"GPS Map" and "Network Weathermap".

While here, minor fixes and get improvements from the current port.

PR: 219685
Submitted by: Vinicius Zavam <egypcio@googlemail.com>
Approved by: garga (mentor)
Differential Revision: https://reviews.freebsd.org/D11023