Change configuration directory for Telegraf 1.26.0

W Telegrafie 1.26.0 zaszła taka zmiana:

telegraf.d Behavior: The default behavior of reading /etc/telegraf/telegraf.conf now includes any .conf files under /etc/telegraf/telegraf.d/. This change will apply to the official Telegraf Docker image as well. This will simplify docker usage when using multiple configuration files.

https://github.com/influxdata/telegraf/blob/master/CHANGELOG.md