Update to 2.6.1:
- Update the embedded SQLite library from 3.18.0 to 3.26.0 to address a remote code execution vulnerability ("Magellan").
- Uses a bundled version of the actor-framework (caf) library so we can remove the port-local build for caf.
Replace broctl-config.sh absolute symlink with a relative one.
Approved by: ler (mentor, implicit)