dcrd v1.7.4

This is a patch release of dcrd to support modifications to version 3 of the test network as well as provide some minor improvements related to mining.

Changelog

This patch release consists of 10 commits from 2 contributors which total to 17 files changed, 225 additional lines of code, and 57 deleted lines of code.

All commits since the last release may be viewed on GitHub here and here.

Protocol and network:

• blockchain: Enforce testnet difficulty throttling (decred/dcrd#2979)
• netsync: Improve sync height tracking (decred/dcrd#2985)

Mining:

• mining: Copy regular txns for alternate templates (decred/dcrd#2985)
• server: Send winning tickets when unsynced mining (decred/dcrd#2985)

RPC:

• rpcserver: Return template errors from getwork RPC (decred/dcrd#2985)

Developer-related package and module changes:

• blockchain: Consistency pass for next req dif calc (decred/dcrd#2979)
• main: Use backported blockchain updates (decred/dcrd#2984)

Testing and Quality Assurance:

• build: Update to latest actions and linter (decred/dcrd#2979)
• build: Use recommended golangci-lint installer (decred/dcrd#2984)

Misc:

• release: Bump for 1.7.4 (decred/dcrd#2986)

Code Contributors (alphabetical order):

• Dave Collins
• Jamie Holdstock