* don't log every time we delete stuff; leave it for the flush * when flushing, break apart counts by sample file dir and include human-readable sizes
* it added "dyn" to trait objects * it changed "..." in patterns to "..=" cargo --version says: "cargo 1.37.0-nightly (545f35425 2019-05-23)"
I plan to use strutil::hex in db/auth.rs.