Log Message:
GeoIP: Update to 1.6.12

1.6.12 2018-01-17

* Populate metro and area code when performing lookups in IPv6 City databases.
  Previously this was only done when using IPv4 City databases.

1.6.11 2017-05-15

* Fix use of a NULL pointer when opening a corrupt database with
  `GeoIP_open`. Reported by Stephan Zeisberg. GitHub #87.

1.6.10 2017-03-29

* GeoIP_database_info now returns the full version string rather than
  incorrectly truncating it. GitHub #79.
* This API is now distributed with a small test copy of GeoIP.dat rather than
  a full copy.
* Fix issue where Visual Studio 2015 was optimizing out initialization code.
  Reported and fixed by Scott Godin. GitHub #81.
* Fix test/benchmark on Windows. Gisle Vanem. GitHub #75.