v2.61.5-RC1

What's Changed

• Fix/stop repeat overflow transactions (#1640) by @hexoscott in #1644
• resolve test issues around bad tx hash table by @hexoscott in #1646
• 0tx block handling and moving to timers from tickers by @hexoscott in #1673
• sender lock to help prevent incorrect nonce checks (#1643) (#1671) by @hexoscott in #1681
• DS client - add TLS support (#1553) by @hexoscott in #1682
• Fix/test sequencing stage timeouts by @IvanBelyakoff in #1684
• perf: remove unneded mem alloc in combine collectors (#1546) (#1547) by @hexoscott in #1686

Full Changelog: v2.61.4-RC1...v2.61.5-RC1

This version brings all features from stable/2.0 and stable/2.60 into 2.61 with the aim of sunsetting the 2 older branches.