test_ssl_server.rb: fix FD leak

* test/webrick/test_ssl_server.rb (assert_self_signed_cert): close
  underlying TCP socket to fix FD leak.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@55992 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/webrick/test_ssl_server.rb

@@ -28,11 +28,13 @@ class TestWEBrickSSLServer < Test::Unit::TestCase
 
   def assert_self_signed_cert(config)
     TestWEBrick.start_server(Echo, config){|server, addr, port, log|
-      sock = OpenSSL::SSL::SSLSocket.new(TCPSocket.new(addr, port))
+      io = TCPSocket.new(addr, port)
+      sock = OpenSSL::SSL::SSLSocket.new(io)
       sock.connect
       sock.puts(server.ssl_context.cert.subject.to_s)
       assert_equal("/C=JP/O=www.ruby-lang.org/CN=Ruby\n", sock.gets, log.call)
       sock.close
+      io.close
     }
   end
 end