Net-SNMP 5.3.1 released

I'm happy to announce the release of version 5.3.1 for Net-SNMP.
There are a few important comments about this release:

- The NEWS file contained in the tar ball is incomplete (my fault).
The NEWS snippit below, however, more accurately reflects the changes.

- Starting with this release, we're also releasing the perl modules
to CPAN as well. The perl modules are already available there as
of today and the SNMP module even contains a few patches over what
is available in the normal tar ball. We've had many issues in the
past with people trying to use incompatible Net-SNMP versions with
the CPAN perl modules, so the Makefile will now check for version
compatibility (and let you know what you options are if they're
incompatible).

The NET-SNMP Development Team

What has Changed recently?
-------------------------------------------

The NEWS file snippits from these releases are as follows:

*5.3.1*

snmpd:
  \- Build fixes, e.g. for latest gcc
  \- Return no access instead of not writable on VACM denials
  \- Prevent endless loop in table\_iterator
  \- extend: recognize failed/duplicate registrations
  \- Various robustness fixes for some mib implementations
  \- A few memory leak fixes
  \- Other misc bug fixes.

snmptrapd:
  \- Fixed support for snmptrapd embedded perl on x86\_64
  \- Other misc bug fixes.

library:
  \- Make SNMPv3 traps work again \(user creation; official patch 1374087\)
  \- Fixes typing issues problem with MIB definitions that use
    intermediate sub-identifiers
  \- Fix snmptranslate -Td output for UNITS
  \- Fix IP address encoding issues on 64Bit architectures
  \- snmp alarm callbacks can be scheduled for ASAP

snmpusm:
  \- Usage of localized keys instead of passphrases with -Ck
  \- New option -CE to specify usmUserEngineID \(necessary to manage
    snmptrapd's usmUserTable\)
  \- performance improvement when changing localized keys

snmpnetstat:
  \- Skip missing entries
  \- Don't choke on SNMPv2 PDU exceptions

snmpstatus:
  \- Don't choke on SNMPv2 PDU exceptions

mib2c:
  \- Misc bug fixes in some of the output styles

Perl:
  \- New perl version numbering to meet CPAN criteria
  \- Check the perl module version number against the net-snmp version
  \- Fixes for 64bit issues
  \- Misc other fixes
  \- The detected perl binary is reported via net-snmp-config

MIBs:
  \- Updated DISMAN-NSLOOKUP-MIB.txt, DISMAN-PING-MIB.txt,
    DISMAN-TRACEROUTE-MIB.txt, and the IANAifType-MIB

Ports:
Linux:
- Fix compilation with ethtool
- Fix Linux CPU counters on SMP machines
HP-UX, Mac OS X, OpenBSD, and Windows:
- Misc build fixes

Misc:
- DESTDIR install path supported
- A number of improvements to the testing suite, including new tests
- Many misce