Replace the implementation of maths in `UnsignedBigInteger`
and `SignedBigInteger` with LibTomMath. This gives benefits in terms of
less code to maintain, correctness and speed.
These changes also remove now-unsued methods and improve the error
propagation for functions allocating lots of memory. Additionally, the
new implementation is always trimmed and won't have dangling zeros when
exporting it.
These changes are arbitrarily divided into multiple commits to make it
easier to find potentially introduced bugs with git bisect.
The modifications in this commit were automatically made using the
following command:
find . -name '*.h' -exec sed -i -E 's/dbg\(\) << ("[^"{]*");/dbgln\(\1\);/' {} \;
Any (future) program that includes this header would fail to compile, because the
private symbol 'kind_name' is defined, along with a bunch of code, but unused.
A good way to see this is by #include'ing LibCrypto/ASN1/ASN1.h in an unrelated
.cpp-file, for example Userland/md.cpp.
No other headers seem to have this problem.
