Updating golang dependancies (#4075)

vendor/github.com/gorilla/handlers/.travis.yml

@@ -7,11 +7,12 @@ matrix:
     - go: 1.5
     - go: 1.6
     - go: tip
-  allow_failures:
-    - go: tip
+
+install:
+  - go get golang.org/x/tools/cmd/vet
 
 script:
   - go get -t -v ./...
   - diff -u <(echo -n) <(gofmt -d .)
-  - go vet $(go list ./... | grep -v /vendor/)
+  - go tool vet .
   - go test -v -race ./...

vendor/github.com/gorilla/handlers/cors.go

@@ -112,9 +112,6 @@ func (ch *cors) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 
 	w.Header().Set(corsAllowOriginHeader, origin)
 
-	if r.Method == corsOptionMethod {
-		return
-	}
 	ch.h.ServeHTTP(w, r)
 }
 

vendor/github.com/gorilla/handlers/cors_test.go

@@ -104,24 +104,6 @@ func TestCORSHandlerInvalidRequestMethodForPreflightMethodNotAllowed(t *testing.
 	}
 }
 
-func TestCORSHandlerOptionsRequestMustNotBePassedToNextHandler(t *testing.T) {
-	r := newRequest("OPTIONS", "http://www.example.com/")
-	r.Header.Set("Origin", r.URL.String())
-	r.Header.Set(corsRequestMethodHeader, "GET")
-
-	rr := httptest.NewRecorder()
-
-	testHandler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		t.Fatal("Options request must not be passed to next handler")
-	})
-
-	CORS()(testHandler).ServeHTTP(rr, r)
-
-	if status := rr.Code; status != http.StatusOK {
-		t.Fatalf("bad status: got %v want %v", status, http.StatusOK)
-	}
-}
-
 func TestCORSHandlerAllowedMethodForPreflight(t *testing.T) {
 	r := newRequest("OPTIONS", "http://www.example.com/")
 	r.Header.Set("Origin", r.URL.String())