Re: Release 2.05.0.6.0: [EDITED] miner and chain reliability improvements

[Jude Nelson]

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Hello,

The previous release announcement had an incorrect link to the Github release page.  This has been corrected below.

The fixed link is https://github.com/blockstack/stacks-blockchain/releases/tag/2.05.0.6.0

Original message follows.

Best,
Jude Nelson
Research Scientist, Stacks Foundation

- ----

We have released Stacks version 2.05.0.6.0, available here: https://github.com/blockstack/stacks-blockchain/releases/tag/2.05.0.6.0.

This fixes a couple of denial-of-service bugs in the miner.  Everyone is encouraged to upgrade as soon as possible.

Changelog:

## [2.05.0.6.0]

### Changed

- - The `/v2/neighbors` endpoint now reports a node's bootstrap peers, so other
  nodes can find high-quality nodes to boot from (#3401)
- - If there are two or more Stacks chain tips that are tied for the canonical
  tip, the node deterministically chooses one _independent_ of the arrival order
(#3419).
- - If Stacks blocks for a different fork arrive out-of-order and, in doing so,
  constitute a better fork than the fork the node considers canonical, the node
will update the canonical Stacks tip pointer in the sortition DB before
processing the next sortition (#3419).

### Fixed

- - The node keychain no longer maintains any internal state, but instead derives
  keys based on the chain tip the miner is building off of.  This prevents the
node from accidentally producing an invalid block that reuses a microblock
public key hash (#3387).
- - If a node mines an invalid block for some reason, it will no longer stall
  forever.  Instead, it will detect that its last-mined block is not the chain
tip, and resume mining (#3406).

Git commit hash: a71871a5b18daf04259a71512d6e18752c0b1e20
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Best,
Jude Nelson
Research Scientist, Stacks Foundation

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