Update to 2.04. Changes since 2.01:
    + Support for older HP switch models moved to new L2::HP4000 class
    + Fix VLAN changing in L2::HP and L2::HP4000 classes
    * Updated model lists in HP classes
    + [2980782] Added L3::CiscoFWSM for Cisco Firewall Services Modules
      (Brian De Wolf)
    + Added L3::Pf for FreeBSD PFSense Firewalls (max)
    * Added specific functions for neighbor mgmt addresses to CDP class
    * Implemented os_bin() method in CiscoStats
    + [2980787] Fix for C1900 bp_index not containing interfaces.
      (Brian De Wolf)
    + [2599795] Added vendor_i_type() method to HP and HP4000 clases
    + [2688801] Minor modification for obscure Proxim/Orinoco device
      (jrbinks)
    + [3051443] Add PoE measured power per port to Cisco, Extrme and HP
      classes (jeroenvi)
    * Minor tweaks to support devices without sysServices
    * Added Cisco CBS3xxx blade switches to L3::C6500
    * Fix for FWSMs not being detected properly.  Special thanks goes to
      Jukka Pirhonen for pointing it out. (Brian De Wolf)
    + Added support for IPv6 to physical address mapping
    * Added ME340x to L3::C3550
    * Added new ProCurve models to HP class

(bouyer)