Segfault (#1298)

On some systems the admin has set no ulimit, this ends up in a segfault
You can merge this Pull Request by running:

  git pull https://github.com/nafets/monitoring-plugins segfault

Or you can view, comment on it, or merge it online at:

  https://github.com/monitoring-plugins/monitoring-plugins/pull/1298

-- Commit Summary --

  * added option to exit with an warning, if there is output on STDERR
  * avoid segfault, if ulimit is not set
  * Revert "avoid segfault, if ulimit is not set", should be done in a
  branch
  * avoid a segfault, if ulimit is set to unlimited
  * Revert "added option to exit with an warning, if there is output on
  STDERR"

-- File Changes --

    M lib/utils_cmd.c (9)

-- Patch Links --

https://github.com/monitoring-plugins/monitoring-plugins/pull/1298.patch
https://github.com/monitoring-plugins/monitoring-plugins/pull/1298.diff

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https://github.com/monitoring-plugins/monitoring-plugins/pull/1298