3.0 default route class

Refs #4438
Sure, no need to use inflection by default for all routes. It's was seeing `fallbacks()` as convenience  to avoid writing these 2 default routes. But I now realize its named "fallbacks" as it's meant to give you fallback behavior like 2.x. Only minor concern is plugin devs could get lazy and use `fallbacks()` instead of writing the `connect()` statements.