gnu: Add go-github-com-oschwald-maxminddb-golang.

* gnu/packages/syncthing.scm (go-github-com-oschwald-maxminddb-golang): New
variable.

gnu/packages/syncthing.scm

@@ -409,6 +409,34 @@ architectures.")
       (home-page "https://github.com/minio/sha256-simd")
       (license asl2.0))))
 
+(define-public go-github-com-oschwald-maxminddb-golang
+  (let ((commit "697da8075d2061aa8ed639346443f5d3e8c80b30")
+        (revision "0"))
+    (package
+      (name "go-github-com-oschwald-maxminddb-golang")
+      (version (git-version "0.2.0" revision commit))
+      (source (origin
+                (method git-fetch)
+                (uri (git-reference
+                      (url "https://github.com/oschwald/maxminddb-golang")
+                      (commit commit)))
+                (file-name (git-file-name name version))
+                (sha256
+                 (base32
+                  "00kkxzlvra0kcbkl56wp0dp1yw3cmfjqqlwbqy7bq5r34s7iavq0"))))
+      (build-system go-build-system)
+      (propagated-inputs
+       `(("go-golang-org-x-sys-unix" ,go-golang-org-x-sys-unix)))
+      (arguments
+       `(#:import-path "github.com/oschwald/maxminddb-golang"
+         #:tests? #f)) ; Requires some unpackaged software and test data
+      (synopsis "MaxMind DB Reader for Go")
+      (description "This is a Go reader for the MaxMind DB format.  Although
+this can be used to read GeoLite2 and GeoIP2 databases, @code{geoip2} provides a
+higher-level API for doing so.")
+      (home-page "https://github.com/oschwald/maxminddb-golang")
+      (license isc))))
+
 (define-public go-golang-org-x-sys-unix
   (let ((commit "f3918c30c5c2cb527c0b071a27c35120a6c0719a")
         (revision "0"))