The default value of FD_SETSIZE is too small for real scenario

**Describe your environment**
Windows 11 10.0.22000.739

**Steps to reproduce**
Run curl_http_test.exe

**What is the expected behavior?**
The test should pass

**What is the actual behavior?**
The test failed

**Additional context**
The test is failed on that the allocated socket handle value is larger than `FD_SETSIZE` which is 64. The value seems too small for real scenario.
