Fixes:
- only increase the ratelimiting difficulty after a successful solution, not on request of a challenge, makes it a bit more difficult to ramp up the difficulty.
- authentication signatures inlude also the original request in addition to the nonce.
- added relro and pie linker flags to build.zig
- eating of zombie childs is much more aggressive
- oracle quits after init.
This release includes a bunch of new features that make deployment more practical:
- environment vars (ORACLE_) allow over-riding any config settings
- better logging
thank you endre and michael for the inputs!