* 2017-05-12 2.8.1.1
  update GLPlugin
* 2017-03-25 2.8.1
  finish liebert/ups mixed emerson in dubai
* 2017-03-09 2.8.0.4
  fix variable in non-standalone
  filter ups-mib alarms
* 2017-03-09 2.8.0.3
  remove unnecessary alarm info
* 2017-03-08 2.8.0.2
  fix xups selftest alarm
* 2017-02-02 2.8.0.1
  fix cs-121 output when on battery (Thanks k0ste)
* 2016-11-11 2.8
  add Emerson Liebert
* 2016-09-27 2.7.1.2
  fix generex trimod without mib-2
* 2016-08-12 2.7.1.1
  update GLPlugin/Extraopts
* 2016-06-21 2.7.1
  fix UPS for Generex cs141
* 2016-06-03 2.7.0.2
  update GLPlugin
* 2016-03-30 2.7.0.1
  bugfix in ups-mib batterytemperature
* 2016-02-08 2.7
  add glplugin submodule
* 2016-01-29 2.6.0.1
  minor bugfixes
* 2016-01-29 2.6
  supports dynamic mib loading
* 2016-01-20 2.5.2.7
  bugfix for apc powernet. no battery status means ok
* 2015-07-13 2.5.2.6
  bugfix for apc powernet. noTransfer input ok, if battery 100% full
* 2015-07-08 2.5.2.5
  bugfix in Socomec Netvision detection
* 2015-05-20 2.5.2.4
  bugfix in V4 battery runtime (undef if not on batt.)
* 2015-04-23 2.5.2.3
  update GLPlugin[SNMP]
* 2015-04-23 2.5.2.2
  update GLPlugin[SNMP]
* 2015-01-26 2.5.2.1
  update GLPlugin[SNMP]
* 2014-12-22 2.5.2
  remove Raritan PX2 (was moved to the new plugin check_pdu_health)
* 2014-12-16 2.5.1
  update GLPlugin
* 2014-12-02 2.5
  implement Raritan PX2
* 2014-10-01 2.4.0.13
  update GLPlugin
* 2014-08-22 2.4.0.12
  bugfix in glplugin/uptime because of buggy snmpengineuptime
* 2014-08-21 2.4.0.11
  GLPluginSNMP update/uptime thresholds
* 2014-08-21 2.4.0.10
  GLPluginSNMP update
* 2014-08-20 2.4.0.9
  GLPluginSNMP update
* 2014-08-19 2.4.0.8
  GLPlugin/SNMP update
* 2014-08-14 2.4.0.7
  GLPluginSNMP update
* 2014-08-01 2.4.0.6
  GLPluginSNMP update
  MerlinGerin also asks XUPS alarm table 
* 2014-07-28 2.4.0.5
  GLPlugin update
* 2014-07-28 2.4.0.4
  added more xups alarm descriptions
* 2014-07-03 2.4.0.3
  update GLPlugin
* 2014-06-06 2.4.0.2
  remove deprecated threshold code in add_perfdata
* 2014-06-04 2.4.0.1
  bugfix in xups alert age
  detect merlingerin before xups
* 2014-05-22 2.4
  finished GLPlugin migration
  rearranged the classification checks
  GLPlugin update
* 2014-03-03 2.3.1
  bugfix in XUPS input current
  bugfix in Merlin Gerin input/output numbers
* 2014-02-21 2.3
  add a check for input voltage = 0
* 2014-02-21 2.2
  code cleanup
* 2014-02-19 2.1
  add UPS-MIB
  add XPCC-MIB
* 2014-02-18 2.0.1
  some bugfixes (unimplemented oids and perl undefs)
* 2014-02-14 2.0
  rewrite using GLPlugin
  raise apc battery temperature threshold
* 2014-01-15 1.2.1
  bugfix for apc powernet outputload undef values
  add XUPS MIB for Eaton 
* 2013-12-24 1.2
  add socomec netys and netvision
* 2013-12-16 1.1
  add apc mge galaxy
* 2013-12-11 1.0
  initial release (can Socomec RT 3000VA and generic UPS V4 devices)
