2021.10.03-alpha

Changelog

• less verbose DEBUG logs (moving some to TRACE instead)
• fixes for eth_subscribe with newHeads
• mining/validation: read a private key from a file (unencrypted, for tests only)
• fix for Checkpoint challenge timeout with geth peers
• improvements for txpool.v2
• remote RPC daemon state cache experiment
• mining/validation: enable London support
• fix for inserting headers with missing parent

SHA256

reproducible builds in Docker aren't functional at the moment