suppress warnings

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47071 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/net/http/test_https.rb

@@ -51,7 +51,7 @@ class TestNetHTTPS < Test::Unit::TestCase
       store_ctx.current_cert.to_der == config('ssl_certificate').to_der
     end
     data = config('ssl_private_key').to_der
-    http.request_post("/", data) {|res|
+    http.request_post("/", data, {'content-type' => 'application/x-www-form-urlencoded'}) {|res|
       assert_equal(data, res.body)
     }
   rescue SystemCallError