ignore "WARNING: failed to install socket filter" messages (#1409)

[Elan Ruusamäe]

originated from pld-linux:
https://github.com/pld-linux/monitoring-plugins/blob/auto/th/monitoring-plugins-2.1.2-1/nagios-plugins-check_ping-socket-filter-warning.patch
You can view, comment on, or merge this pull request online at:

  https://github.com/monitoring-plugins/monitoring-plugins/pull/1409

-- Commit Summary --

  * ignore "WARNING: failed to install socket filter: Protocol not
  available" message

-- File Changes --

    M plugins/check_ping.c (1)

-- Patch Links --

https://github.com/monitoring-plugins/monitoring-plugins/pull/1409.patch
https://github.com/monitoring-plugins/monitoring-plugins/pull/1409.diff

-- 
Reply to this email on GitHub:
https://github.com/monitoring-plugins/monitoring-plugins/pull/1409
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