[monitoring-plugins] Merge branch 'pr/1363'

[Holger Weiss]

 Module: monitoring-plugins
 Branch: master
 Commit: 3f17f18416521ee90b8823bab3324188976ac265
 Author: Holger Weiss <holger at zedat.fu-berlin.de>
   Date: Sun Oct  4 23:34:01 2015 +0200
    URL: https://www.monitoring-plugins.org/repositories/monitoring-plugins/commit/?id=3f17f18

Merge branch 'pr/1363'

* pr/1363:
  use unknown exit code for help/version in plugins-root as well
  use unknown exit code for help/version in plugins
  change exit code to unknown on help and version info
  use exit code 3 for version and help

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