Close FDs.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46261 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/net/http/test_https.rb

@@ -79,6 +79,7 @@ class TestNetHTTPS < Test::Unit::TestCase
     socket = http.instance_variable_get(:@socket).io
 
     assert socket.session_reused?
+    http.finish
   rescue SystemCallError
     skip $!
   end