1. Changed versioning scheme. This version is 2.27.0, in other words, release number 28 in the erigon 2 line.
2. Added support for Nano fork of BSC, thanks to external contributor tsutsu.
3. Reverted some of the block downloading changes made in the previous release due to issues faced by some users.
4. Added --experimental.lightclient command line flag to run an embedded CL (Consensus Layer) light client. Not recommended for general use, but may be more convinient for testing purposes. It is still considered a prototype.