- Add a comment describing why tick_init() is called before cninit(). - Fix a typo in another comment.
- Add a comment describing why tick_init() is called before cninit().
- Fix a typo in another comment.

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase