Old Dip Tracker

Opened #3458 to help with this, as a step towards c++17

Question before concept ACK: this was done upstream to not have to include `crypto/hash.h` but be able to just include the Siphash header on its own. I don't see any...

> I picked this one because it's where SipHashUint256Extra comes into the code space. Not related to whether we want to split off this file, but: `SipHashUint256Extra` is used to...

We cannot backport scripted diff commits in 99% of the cases anyway, because code has diverged. The only usable thing from these could be the script, but even these don't...

Alright, so concept ACK on moving it. But should keep it move-only as the commit says. I'm not sure how urgent the move is without the added code though, I...

Here's my thoughts on this: IF someone wants to change the granularity of `CCoinsViewCache` to be at the level of utxo instead of transaction, we'll have to quantify the benefits...

The good news is: I am unable to reproduce this with clang-16 and boost 1.83 on arch linux, so those aren't the cause. I'll look into FreeBSD 14 in the...

Per @chromatic's comment, this is indeed a boost issue. Debian and Arch patched it but freebsd pkg didn't. Should work again with [boost-libs-1.84.0.pkg](https://freebsd.pkgs.org/13/freebsd-amd64/boost-libs-1.84.0.pkg.html) on x86_64.

I'll add a note to the release notes that compiling with unpatched boost-1.83.0 will result in an error.

> a list somewhere that mentions minimum OS that will provide a clean build No. The process really only actively supports the release binaries. For example, there are no automated...