CTFy third-party notices

ip2region (IP address location data and searcher)
-------------------------------------------------
CTFy shows where a recorded IP address is (province, city, carrier) by
looking it up, offline and on the server itself, in ip2region databases.
No address is ever sent to an external service.

  Project:   https://github.com/lionsoul2014/ip2region
  Copyright: 2022 The Ip2Region Authors. All rights reserved.
  License:   Apache License, Version 2.0
             https://www.apache.org/licenses/LICENSE-2.0

Two parts are used, both under that licence:

  * The databases ip2region_v4.xdb and ip2region_v6.xdb, which the
    container image bundles (pinned in ctfy/core/ip2region_data.py) and
    which `ctfy-admin ip2region update` replaces with newer upstream
    copies. They are used unmodified.
  * The official Python searcher, installed as the `py-ip2region` package
    (version 3.0.6 or later, Apache-2.0).

The ip2region data is aggregated from public sources by its authors and is
provided without warranty; locations are approximate and may be wrong or
out of date. Treat them as a hint, never as evidence.
