gnu: Add go-github-com-audriusbutkevicius-go-nat-pmp.

* gnu/packages/syncthing.scm: New file.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add it.

gnu/local.mk

@@ -382,6 +382,7 @@ GNU_SYSTEM_MODULES =				\
   %D%/packages/suckless.scm			\
   %D%/packages/swig.scm				\
   %D%/packages/sync.scm			\
+  %D%/packages/syncthing.scm			\
   %D%/packages/synergy.scm			\
   %D%/packages/syndication.scm			\
   %D%/packages/task-management.scm		\

gnu/packages/syncthing.scm

@@ -0,0 +1,48 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2016 Petter <petter@mykolab.ch>
+;;; Copyright © 2016, 2017 Leo Famulari <leo@famulari.name>
+;;;
+;;; This file is part of GNU Guix.
+;;;
+;;; GNU Guix is free software; you can redistribute it and/or modify it
+;;; under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 3 of the License, or (at
+;;; your option) any later version.
+;;;
+;;; GNU Guix is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;;; GNU General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (gnu packages syncthing)
+  #:use-module (guix build-system go)
+  #:use-module (guix packages)
+  #:use-module (guix git-download)
+  #:use-module (guix licenses))
+
+(define-public go-github-com-audriusbutkevicius-go-nat-pmp
+  (let ((commit "452c97607362b2ab5a7839b8d1704f0396b640ca")
+        (revision "0"))
+    (package
+      (name "go-github-com-audriusbutkevicius-go-nat-pmp")
+      (version (git-version "0.0.0" revision commit))
+      (source (origin
+                (method git-fetch)
+                (uri (git-reference
+                      (url "https://github.com/AudriusButkevicius/go-nat-pmp")
+                      (commit commit)))
+                (file-name (git-file-name name version))
+                (sha256
+                 (base32 "1accmpl1llk16a19nlyy991fqrgfay6l53gb64hgmdfmqljdvbk7"))))
+      (build-system go-build-system)
+      (arguments
+       `(#:import-path "github.com/AudriusButkevicius/go-nat-pmp"))
+      (synopsis "Port mapping and discovery of external IP address")
+      (description "This packages provides a Go client for the NAT-PMP internet
+protocol for port mapping and discovering the external IP address of a
+firewall.")
+      (home-page "https://github.com/AudriusButkevicius/go-nat-pmp")
+      (license asl2.0))))