Deadwood-2 hash core finished; ObHack update

I have finished the core hash that will be the Deadwood-2 cache this weekend. This is a data structure that is optimized for making a DNS cache. It's like the cache MaraDNS currently uses, but a much simpler, clener codebase with some features MaraDNS' current cache does not have. This code can now be expanded to make a caching forwarding DNS server.

The one feature I want to add to the core hash first, however, is the ability to write the cache to a file, and read the cache from a file.

The updated snapshot can be downloaded here

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I also have an update to ObHack, fixing some critical bugs, and adding one "feature":

• Critical fix: Door statues are now less likely to make it impossible to finish a level w/o the "noclip" (OK, "kitty") cheat code.
• Critical fix: Being unable to find a door fab no longer causes ObHack to crash and burn (we just try with a different level)
• Critical fix: Now there's a high recursion depth limit when retrying to plan a level; this way, the program does not freeze in an infinite loop if it's impossible to find a plan that meets the requirements.
• Critical fix: An assert when making small deathmatch maps sometimes failed. Fixed; assert removed.
• Feature added: Heretic "full game" megawads now make E6M1-3, with E6M3 not having an exit (neither in single player nor deathmatch)

ObHack can be downloaded here