This *should* solve #517, but I don't know C# 🙃

Implement the next phase of bep52.

We can download V2 torrents now!

Don't rely on any weird length checks throughout the code
to know whether or not we're dealing w...

Mutations can happen internally, when we actually append data.

They all fail the hashecheck though. The hashes don't match.

Odd! Am i calculating the wrong st...

So... the code comments in the python implementation of a bep52
compliant torrent creator have a...

Now i just need to use SHA256 when computing the hash of the
downloaded data and we should see s...

The SHA256 and SHA1 infohashes are always computed as it's not
easy to predetermine whether a to...

This is dynamic for v2 torrents so we can future proof
this code by migrating it to the ITorrent...

A torrent can have V1, V2 or V1+V2 info hashes. Let's incremental
our way to that by migrating f...

This is intended to indicate that it's the raw bytes,
not an actual InfoHash object.

Propagate it through ITorrentFileInfo too

When changing from Downloading mode to Seeding mode we
should close any open PieceWriters so tha...

* [core] Rename ITorrentData -> ITorrentManagerInfo

* [bep52] Support dynamic piece sizes

...

Some cleanups to the API and to remove the dependency on
20byte hashes.

Next phase of downloading bep52 compliant torrents - complete.

Now that the data is parsed, val...

The only real usage for this is to mock out some
SHA1 hashing in tests for performance reasons.
...

Huzzah

This validates the piece data isn't corrupt/faked in the
torrent.

This should be ReadOnlyMemory<byte>, not Memory<byte>. Appending
data is a readonly operaiton so...

Disable code analysis as it's mostly producing junk. I have
hundreds of warnings which cannot be...

Unblocks the next phase of Bep 52 support.

Now it's threadsafe when users call StartAsync/StopAsync on multiple different TorrentManager in...

Better than byte[].

[core] Allow to load FastResume objects from a stream

Since FastResume.Encode() can write to a stream, it makes sense to allow
FastResume.TryLoad() to...

Piece picking perf improvements

We need to keep a few things in sync now, so create a wrapper
class to reduce the risk of things...

Before:
| Method | Mean | Error | StdDev | Gen 0...

Use a temp bitfield to determine which pieces are available for
picking. We have super optimised...

This is about 10% faster:
| Method | Mean | Error | StdDev | ...

Keep a BitField and mark pieces which have already
been requested. This is about 30% faster:
| ...

Initial results:
| Method | Mean | Error | StdDev | Gen 0 | Al...

Performance is about 3x better.

| Method | Mean | Error | Std...

Migrate all of these to the same pattern as
NAnd. They're less frequently used, but this
keeps t...

This is the most expensive method when picking
pieces, so improve the performance slightly.

The...

.NET has finally provided access to CPU instructions which
improve the performance of BitField.
...

99.99% of the time we won't need to rename files, so
only allocate a list when a file move needs...

We can leverage the new overloads in .NET 2.1 to write
the hash of the piece to a reusable/cache...

[core] Replace invalid characters in the generated path

Urgh.

Firstly, ensure the constructed path doesn't contain
invalid characters.

Secondly, ensure that ...

'SavePath' is the path the user provides. By default a multi-file
torrent will create a sub-dire...

Replace invalid characters with the hex equivalent (and hope
there is no collision).

Addresses ...

Record total bytes sent/received, as well as the
estimated transfer rate in bytes/second.

Add docs covering each property, describing exactly how the value is calculated.

Addresses #488

Disable parsing of v2 only torrents by default so I can
incrementally add support throughout the...

If we retain/reuse Piece objects we eliminate that last of the
per-piece allocations.

tbh there...

Slowly migrate PiecePicker to use a Span<BlockInfo> to write pieces
to instead of passing back a...

Previously PieceMessage had specialised support which allowed
the underlying buffer to be freed ...

Use multitargeting to provide each of the three execution platforms.

The .NETStandard 2.0 compatibility shim was broken. Oops.

Call it like a regular extension method. It can't be confused
with Enumerable.SequenceEqual

Some tests stop the listener so we need to ensure the
listener is running at the start of every ...

* [core] Migrate to Span<T> and Memory<T> throughout

In terms of overall performance, this is...

Useful for microbenchmarks

Also split ITrackerConnection out of ITracker.

Internally a tracker is just a tracker, the only...

Make them appear in a 'Linked' subdirectory in the project

* [dht] Move Dht to it's own library (again)

It's just impossible to keep this working. Meh.

It'll make builds a little faster and cut down on
compiler warnings.