check_netscaler

• added automated tests against a NetScaler CPX with TravisCI
• using /usr/bin/env instead of hardcoding the perl binary path
• added filter parameter for filtering out objects from the API response (used in state, sslcert, staserver and interface) (#31)
• disabled performance data in sub state for services

Breaking changes

• switched from Nagios::Plugin to Monitoring::Plugin (Nagios::Plugin was renamed to Monitoring::Plugin in 2014)
• please install the perl-Monitoring-Plugin RPM before upgrading to v1.4.0

New commands

• added command ntp to check NTP status (#18)
• added command hastatus to check the status of an high availability pair (#25)

Fixes and enhancements

• merged check_threshold and get_perfdata into one function: check_threshold_and_get_perfdata
• command state: more performance data when testing single vserver and service objects (not servicegroups)

• removed command server from the plugin (replaced by state in v1.3.0)
• refactoring of command check_state
  • cleanup and simplified code (counter etc.)
  • added support for testing servers (makes check_server obsolet)
  • added warning level for DISABLED and PARTIAL-UP
• harmonize plugin output for all commands
• plugin_test.sh does now use --extra-opts to be more flexible
• added Time-Piece and Data-Dumper in the installation instructions
• renamed check performancedata to perfdata (backwards compatible); small documentation changes
• renamed checks 'string' and 'string_not' to 'matches' and 'matches_not' (with backwards compatibility)
• accept multiple values for threshold checks (#7)
• added switch --api to select a different version of the NITRO API (#16)
• added example for requesting performance data from global counters (#13)
• allow usage of urlopts everywhere (also fixes #13)
• added sub check_license to check the expiry date of a license file (#17)