Graphite config parser

[osdrv]

No description provided.

[azhiltsov]

worth to mention that this is the carbon-c-relay config parser (not graphite)
and flow graphite plugin targeting a drop-in replacement for carbon-c-relay in the future.

[osdrv]

Thank you for the comment @azhiltsov. Indeed, this is an attempt to mock carbon-c-relay config, I believe it might be reflected in the plugin name.