* Update SQLite to v3.33.0
* Update to FBInk v1.22.2
* Update inih
* Ensure config files are parsed in alphabetical order (instead of based on inode number)
* Update the IPC socket's mtime when there was a meaningful change to configs.
  Allows frontends like NickelMenu to detect config updates (neat idea courtesy of @pgaskin).
* Add version & full-version IPC commands
* Write a pidfile on startup
* Various minor code cleanups