https://github.com/ruby/resolv/commit/599f78c451

```
TestResolvDNS#test_no_server:
Test::Unit::ProxyError: Timeout::Error
    /path/to/ruby/test/resolv/test_dns.rb:531:in 'TestResolvDNS#test_no_server'
```

RFC 1035 specifies the 255-octet maximum name length. This change set
checks the limit.

https://github.com/ruby/resolv/commit/4c2f71b5e8

https://github.com/ruby/resolv/actions/runs/12021339854/job/33511655994?pr=64

```
  => 705:     with_udp_and_tcp('127.0.0.1', 0) do |u1, t1|
     706:       with_udp_and_tcp('127.0.0.1', 0) do |u2,t2|
     707:         u2.close # XXX: u2 UDP socket is not used, but using #with_udp_and_tcp to enable Windows EACCES workaround
     708:         _, server1_port, _, server1_address = u1.addr
Error: Errno::EACCES: Permission denied - bind(2) for "127.0.0.1" port 55685
```

https://github.com/ruby/ruby/actions/runs/12005069051/job/33461068529?pr=12161

```
    1) Error:
  TestResolvDNS#test_multiple_servers_with_timeout_and_truncated_tcp_fallback:
  Errno::EACCES: Permission denied - bind(2) for "127.0.0.1" port 50676
      D:/a/ruby/ruby/src/test/resolv/test_dns.rb:78:in 'TCPServer#initialize'
      D:/a/ruby/ruby/src/test/resolv/test_dns.rb:78:in 'TCPServer.new'
      D:/a/ruby/ruby/src/test/resolv/test_dns.rb:78:in 'TestResolvDNS#with_udp_and_tcp'
      D:/a/ruby/ruby/src/test/resolv/test_dns.rb:705:in 'TestResolvDNS#test_multiple_servers_with_timeout_and_truncated_tcp_fallback'
```

https://github.com/ruby/resolv/commit/05765df178

https://github.com/ruby/resolv/commit/83f18e2a49

Follow up to 589f1978d8c368b8eccf34453463ad46a58d36da

I suspect `UDPSocket.new` grabs the same port number because they are
closed at each trial.

```
 1) Error:
  TestResolvDNS#test_multiple_servers_with_timeout_and_truncated_tcp_fallback:
  Errno::EACCES: Permission denied - bind(2) for "127.0.0.1" port 59677
      D:/a/ruby/ruby/src/test/resolv/test_dns.rb:78:in 'TCPServer#initialize'
      D:/a/ruby/ruby/src/test/resolv/test_dns.rb:78:in 'TCPServer.new'
      D:/a/ruby/ruby/src/test/resolv/test_dns.rb:78:in 'TestResolvDNS#with_udp_and_tcp'
      D:/a/ruby/ruby/src/test/resolv/test_dns.rb:711:in 'TestResolvDNS#test_multiple_servers_with_timeout_and_truncated_tcp_fallback'

    2) Error:
  TestResolvDNS#test_query_ipv4_address_truncated_tcp_fallback:
  Errno::EACCES: Permission denied - bind(2) for "127.0.0.1" port 59689
      D:/a/ruby/ruby/src/test/resolv/test_dns.rb:78:in 'TCPServer#initialize'
      D:/a/ruby/ruby/src/test/resolv/test_dns.rb:78:in 'TCPServer.new'
      D:/a/ruby/ruby/src/test/resolv/test_dns.rb:78:in 'TestResolvDNS#with_udp_and_tcp'
      D:/a/ruby/ruby/src/test/resolv/test_dns.rb:223:in 'TestResolvDNS#test_query_ipv4_address_truncated_tcp_fallback'
```

The listening TCP socket is closed by `with_udp_and_tcp` helper, but
the connected socket is leaking.

```
Leaked file descriptor: TestResolvDNS#test_multiple_servers_with_timeout_and_truncated_tcp_fallback: 12 : #<TCPSocket:fd 12, AF_INET, 127.0.0.1, 50888>
COMMAND     PID     USER   FD   TYPE    DEVICE SIZE/OFF NODE NAME
ruby    3248055 chkbuild   12u  IPv4 112546322      0t0  TCP localhost:50888->localhost:40112 (CLOSE_WAIT)
```

For the purpose of the test case to simulate a timeout over TCP
transport, we have to delay closing this socket until the end the test
case.

Fixup: https://github.com/ruby/resolv/pull/50

https://github.com/ruby/resolv/commit/236c38bdb1