A useful and lightweight /ping command with latency and server load, for Bukkit and Spigot.
/ping — displays own ping
/ping <player> — displays ping for this player
Aliases: /lag, /latency
Permission: ping.ping (default true).

The latest version only support Minecraft 1.15+; for older Minecraft versions (up to 1.9), please use version 1.2.
Diagnostics
If the latency or server load is high, the command displays a diagnostic to help the player understand its performances problems.
Permission: ping.diagnostic (default true).

Monitoring
By using /toggleping (or clicking on “keep displayed” in the /ping output), the ping can be kept displayed above the inventory, on the action bar. That can be useful to monitor your connection if it is bad, or the server performances.
Permission: ping.toggleping (default true).

Translations
Translated in French (see configuration file). Use the provided POT file if you want to translate it in your language (and send me the translation, if you want it to be available for others too).
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