C library for reading MaxMind DB files

The libmaxminddb library provides a C library for reading MaxMind DB files, including the GeoIP2 databases from MaxMind. This is a custom binary format designed to facilitate fast lookups of IP addresses while allowing for great flexibility in the type of data associated with an address. The MaxMind DB format is an open file format. The specification is available at https://maxmind.github.io/MaxMind-DB/ and licensed under the Creative Commons Attribution-ShareAlike 3.0 Unported License.