Define HAVE_* and CROSS_COMPILING to 1 instead of just defining them.
Remove -fcatch-undefined-c99-behavior, will be replaced by -fsanitize=integer
Resurrect example-ldns-opendns-set-client-ip, it's very useful for support
Add test-script.sh
Sync libsodium
Remove libsodium copy
Add libsodium as a submodule