Shear Sentinel v17

Shear Sentinel v17 (product 17.0).

After a losing solo block is discarded, the node keeps fetching until it is on the taller peer tip, and a connected solo miner is given a new job from that tip.

Book shear-testnet-v10 is unchanged. Continuum stays 0.67. Tag v16 stays on the same commit as tag 0.66.

macOS download is shear-node-v17-macos.dmg. The other OS packs stay zips, each built on that OS:

• shear-node-v17-windows.zip
• shear-node-v17-linux.zip
• shear-node-v17-archlinux.zip
• shear-node-v17-fedora.zip
• shear-node-v17-opensuse.zip
• shear-node-v17-macos.dmg