Authorization feature - multiple user types on web gui

[pgerencser]

We would like to use a stdlib.listIPv4Generic miner, editing this static list via web gui.
It would be nice, if I could create special users for NOC/SOC operators who are permitted to add/remove addresses to/from the miner, but modifying the node structure or creating new users or purge logs is forbidden.
This feature would require two user roles/types: administrator (who can do anything), and operators (who can only add/delete indicators to/from a specific node).