Changes 5.4.3:
snmpd:
  - Change default AgentX target from 0.0.0.0:705 to localhost:705
  - Fix CVE-2008-4309 (GETBULK issue reported by Oscar Mira-Sanchez)
  - Fix handling of multiple matching VACM entries
    (Use the "best" match, rather than the first one).
        Note that this could potentially affect the behaviour of
        existing access control configurations.
  - Latch large-disk statistics at 2Tb (rather than wrapping)

Linux:
  - Fix build on modern distributions (using rpm-4.6)

Windows:
  - Fix various builds (recent MSVC, MinGW, IPv6, winExtDLL)

(adam)