Log Message:
Changes 5.7.3:
Many many bug fixes and minor improvements

snmpd, snmptrapd and apps:
  - Patch 2525: from Ryan Steinmetz: Fix argument length parsing of the
    host resources mib
  - Make ENV_SEPARATOR_CHAR configurable
  - SECURITY: a denial of service attack vector was discovered on
    the linux implementation of the ICMP-MIB.  This release fixes
    this bug and all users are encouraged to update their SNMP
    agent if they make use of the ICMP-MIB table objects.

perl:
  - BUG: 2402: Add support for SNMPv3 traps

Windows:
  - Port batch build infrastructure to Visual Studio 2010 and later
    From Visual Studio 2010 on it is no longer possible to specify
    include or library directories globally - these have to be
    specified per project. Hence two additional menu entries in
    build.bat that allow to specify these directories.
  - Patch from Bart Van Assche to improve cygwin building