This change:
- renames pkg/prometheus into pkg/metrics
- renames the prometheus_addr config to metrics_addr
- adds pprof endpoints to the metrics server
- removes profile/trace cli flags
- adds endpoints for profiling to the metrics server
Update to allow arrays of routes to be passed to the http frontend.
This also supports named parameters as permitted by the
router.
To avoid external dependencies in the middleware, a RouteParam and
RouteParams type was added to the bittorrent package.
Note: this eliminates the need for "enable_legacy_php_urls", as
the the additional route could be added to the route array. However,
this may be considered a breaking change.
