Issue Description:

When logging into a SpongeForge-enabled server, a series of log entries are produced on the server:

[15:21:00] [Server thread/ERROR]: Root command /unknown:dynmap does not have an associated plugin! Using "unknown" in place of plugin ID for the permission.
[15:21:00] [Server thread/ERROR]: Root command /unknown:dmap does not have an associated plugin! Using "unknown" in place of plugin ID for the permission.
[15:21:00] [Server thread/ERROR]: Root command /unknown:dmarker does not have an associated plugin! Using "unknown" in place of plugin ID for the permission.
[15:21:00] [Server thread/ERROR]: Root command /unknown:dynmapexp does not have an associated plugin! Using "unknown" in place of plugin ID for the permission.

Dynmap commands seem to be working fine otherwise.

Dynmap Version:

v3.4-beta-5-806

Server Version:

Forge MC1.16.5 v36.2.39
SpongeForge v1.16.5-36.2.5-8.1.0-RC1164

Steps to Replicate:

Install a Minecraft server with Forge, SpongeForge, and Dynmap. Grant self OP Status. Login to server.

[x] I have looked at all other issues and this is not a duplicate
[x] I have been able to replicate this

Is this any different than what SF does for all Forge-but-not-Sponge mods?

This is SpongeForge behavior for any Forge mod, which is what we are - nothing to be done.