[monitoring-plugins] update_gnulib_2021 branch created

[Git Repository]

 Module: monitoring-plugins
 Branch: update_gnulib_2021
   SHA1: 6169a7a7480ae2247161ac6aaf4935d40774725a
    URL: 
https://www.monitoring-plugins.org/repositories/monitoring-plugins/log/?id=refs/heads/update_gnulib_2021

The update_gnulib_2021 branch has been created.