vidforward: set up server configuration file

[Saxon Milton]

This configuration file would contain current log level, logging filters and other useful parameters to come down the track. We could use a package like fsnotify to notify the service of changes to the configuration file and act accordingly.

[Saxon Milton]

Merged in config-watcher (pull request #505)

vidforward: add config file watcher

Resolves issue #407

Approved-by: Trek Hopton

→ <<cset 41fd1e345beb>>