Support for arbitrary comments in peers configuration

Breaking change

The exporter now requires you to specify the friendly names in a specific format (only if you want to use them of course). This allows you to use arbitrary comments in the file while keeping the friendly name functionality. Thank you Miloš Bunčić for this. This also paves the way for future metadata.

In order to migrate you can use this sed command:

sed -i  's/#/# friendly_name=/' peers.conf

Please make sure to do a backup before using it!