- Upgrade to 5.3.1 [1].
- Add $snmpd_flush_cache knob [2].
- Add conflict with net-snmp-4.* [3].
PR: ports/97673 [1] (but mostly rewritten), ports/106036 [2],
ports/103462 [3]
Submitted by: Rick van der Zwet <rick@wzoeterwoude.net> [1],
"Brian A. Seklecki"<bseklecki@collaborativefusion.com> [2],
Mykola Dzham <freebsd@levsha.org.ua> [3]