PluginGlob is the glob pattern used to find plugins.

Handshake is a common handshake that is shared by shared and host.

PluginMap is the map of plugins we can dispense.

This is the implementation of plugin.GRPCPlugin so we can serve/consume this.

Here is the gRPC server that FilterGRPCClient talks to.

Plugin is a single plugin that has been loaded.

PluginManager is responsible for discovering and starting plugins.