- Relaxed message parsing slightly.
- The old 'version' message header is now the 'client' message header.
- Many files were missing an explicit cmake.h include. Some were not including it at all. Now it's used almost everywhere. (cherry picked from commit 82ae86979c497e6d1d0c6b2b5a55aa379ec82c98)
- Migrated taskd messaging code over, for client-side communications.
