gnu: Add go-github-com-azure-go-ntlmssp.

gnu/packages/syncthing.scm (go-github-com-azure-go-ntlmssp): New variable.

gnu/packages/syncthing.scm

@@ -1011,6 +1011,29 @@ Go language.")
 language.")
     (license expat)))
 
+(define-public go-github-com-azure-go-ntlmssp
+  (package
+    (name "go-github-com-azure-go-ntlmssp")
+    (version "0.0.0-20211209120228-48547f28849e")
+    (source
+      (origin
+        (method git-fetch)
+        (uri (git-reference
+               (url "https://github.com/Azure/go-ntlmssp")
+               (commit (go-version->git-ref version))))
+        (file-name (git-file-name name version))
+        (sha256
+          (base32 "0im28kp9p6ncdmh7qq5qwl85nmiwmp8jka2qgrjiqzc5n36q56np"))))
+    (build-system go-build-system)
+    (arguments '(#:import-path "github.com/Azure/go-ntlmssp"))
+    (propagated-inputs
+     (list go-golang-org-x-crypto))
+    (home-page "https://github.com/Azure/go-ntlmssp")
+    (synopsis "NTLM negotiation in Go")
+    (description
+     "This package provides NTLM/Negotiate authentication over HTTP.")
+    (license expat)))
+
 (define-public go-github-com-flynn-archive-go-shlex
   (let ((commit "3f9db97f856818214da2e1057f8ad84803971cff")
         (revision "0"))