Update p5-SNMP-Info to 2.06.

Changes from previous:
version 2.06 (2011-09-28)

    [NEW FEATURES]

    * Support for PacketFront devices in new class L3::PacketFront
    * Support for Mikrotik devices in new class L3::Mikrotik
    * Support for HP VirtualConnect switches in new class L2::HPVC
    * Support for ADSL-LINE-MIB in new class AdslLine

    [ENHANCEMENTS]

    * POD clarification on i_speed() munging by Info.pm
    * Added i_stack_status method that can be used for finding the parent
      interface for e.g. ADSL interface speed determination

    [BUG FIXES]

    * [3344843] Fix returning serial() and os_ver() for web-managable HP
      switches, introduced by HP/HP4000 class split, reported by J R Binks
    * [2809033] Put L2-only Cisco blade switches in L3::C6500
    * [3408506] Fix uninitialized value in IPv6 when neighbor state is
      incomplete (Michael Borgelt)

version 2.05 (2011-06-23)
    + Fix broken function call in L2::Aironet
    + Promote L2::Aruba to L3::Aruba, as Aruba devices can be L3 entities and
      provide L3 information.

(hiramatsu)