subnetdb persistent storage file leak
In addition to the memory leaks in #406 (closed), each subnetdb now has its own persistent storage as well (see the mods to KNDF.getDbDir()).
These directories are never deleted. I also question whether persistent storage is necessary at all for subdbs. All mine are empty but these are transient dests for shared clients. What's the intent, and threat model, for persisting subnetdb RIs across restarts, and for keeping them separate from the "main" persisted netdb?
Have the persistent storage issues for subdbs been thought through?