This change:
- Adds server metrics to prometheus endpoint.
- Adds database metrics to prometheus endpoint.
- Adds pools metrics to prometheus endpoint.
- Change metrics name to have a prefix of (stats|pools|databases|servers).
* create a hyper server and add option to enable it in config
* move prometheus stuff to its own file; update format
* create metric type and help lookup table
* finish the metric help type map
* switch to a boolean and a standard port
* dont emit unimplemented metrics
* fail if curl returns a non 200
* resolve conflicts
* move log out of config.show and into main
* terminating new line
* upgrade curl
* include unimplemented stats
