net-mgmt/cacti: Update to 1.2.10

Changes this release:

https://github.com/Cacti/cacti/blob/release/1.2.10/CHANGELOG

PR: 245198
Submitted by: Michael Muenz <m.muenz@gmail.com>
Approved by: Daniel Austin <freebsd-ports@dan.me.uk> (maintainer)
MFH: 2020Q2
Security: https://www.vuxml.org/freebsd/e2b564fc-7462-11ea-af63-38d547003487.html