Block nav lookup / allow bots to join without nav meshes

[justinnobledev]

Are you able to bring in this feature from cs2fxies to this?

https://github.com/Source2ZE/CS2Fixes/blob/742bb9269d6f1a8ece6de786c03bf13bacc366d8/src/detours.cpp#L468

Not sure if this alone allows bots to join without nav meshes or not but this is the main feature that keeps cs2fixes on my surf server