Use "127.0.0.1" instead of "localhost" host argument

Platform: Fedora linux
Deno version: 
```
$ deno --version
deno 2.5.2 (stable, release, x86_64-unknown-linux-gnu)
v8 14.0.365.5-rusty
typescript 5.9.2
```


```
rahulrajesh@fedora:~/projects/h1spec$ deno run --allow-net http_test.ts localhost 8000
Error in test "Fragmented method": ConnectionRefused: Connection refused (os error 111)
    at async Object.connect (ext:deno_net/01_net.js:701:11)
    at async runTestCase (file:///home/rahulrajesh/projects/h1spec/http_test.ts:223:22)
    at async Promise.all (index 0)
    at async runTests (file:///home/rahulrajesh/projects/h1spec/http_test.ts:209:21) {
  name: "ConnectionRefused",
  code: "ECONNREFUSED"
}
Error in test "Fragmented URL 1": ConnectionRefused: Connection refused (os error 111)
    at async Object.connect (ext:deno_net/01_net.js:701:11)
    at async runTestCase (file:///home/rahulrajesh/projects/h1spec/http_test.ts:223:22)
    at async Promise.all (index 1)
    at async runTests (file:///home/rahulrajesh/projects/h1spec/http_test.ts:209:21) {
  name: "ConnectionRefused",
  code: "ECONNREFUSED"
}
Error in test "Fragmented URL 2": ConnectionRefused: Connection refused (os error 111)
    at async Object.connect (ext:deno_net/01_net.js:701:11)
    at async runTestCase (file:///home/rahulrajesh/projects/h1spec/http_test.ts:223:22)
    at async Promise.all (index 2)
    at async runTests (file:///home/rahulrajesh/projects/h1spec/http_test.ts:209:21) {
  name: "ConnectionRefused",
  code: "ECONNREFUSED"
}
Error in test "Fragmented URL 3": ConnectionRefused: Connection refused (os error 111)
    at async Object.connect (ext:deno_net/01_net.js:701:11)
    at async runTestCase (file:///home/rahulrajesh/projects/h1spec/http_test.ts:223:22)
    at async Promise.all (index 3)
    at async runTests (file:///home/rahulrajesh/projects/h1spec/http_test.ts:209:21) {
  name: "ConnectionRefused",
  code: "ECONNREFUSED"
}
Error in test "Fragmented HTTP version": ConnectionRefused: Connection refused (os error 111)
    at async Object.connect (ext:deno_net/01_net.js:701:11)
    at async runTestCase (file:///home/rahulrajesh/projects/h1spec/http_test.ts:223:22)
    at async Promise.all (index 4)
    at async runTests (file:///home/rahulrajesh/projects/h1spec/http_test.ts:209:21) {
  name: "ConnectionRefused",
  code: "ECONNREFUSED"
}
Error in test "Fragmented request line": ConnectionRefused: Connection refused (os error 111)
    at async Object.connect (ext:deno_net/01_net.js:701:11)
    at async runTestCase (file:///home/rahulrajesh/projects/h1spec/http_test.ts:223:22)
    at async Promise.all (index 5)
    at async runTests (file:///home/rahulrajesh/projects/h1spec/http_test.ts:209:21) {
  name: "ConnectionRefused",
  code: "ECONNREFUSED"
}
Error in test "Fragmented request line newline 1": ConnectionRefused: Connection refused (os error 111)
    at async Object.connect (ext:deno_net/01_net.js:701:11)
    at async runTestCase (file:///home/rahulrajesh/projects/h1spec/http_test.ts:223:22)
    at async Promise.all (index 6)
    at async runTests (file:///home/rahulrajesh/projects/h1spec/http_test.ts:209:21) {
  name: "ConnectionRefused",
  code: "ECONNREFUSED"
}
Error in test "Fragmented request line newline 2": ConnectionRefused: Connection refused (os error 111)
    at async Object.connect (ext:deno_net/01_net.js:701:11)
    at async runTestCase (file:///home/rahulrajesh/projects/h1spec/http_test.ts:223:22)
    at async Promise.all (index 7)
    at async runTests (file:///home/rahulrajesh/projects/h1spec/http_test.ts:209:21) {
  name: "ConnectionRefused",
  code: "ECONNREFUSED"
}
Error in test "Fragmented field name": ConnectionRefused: Connection refused (os error 111)
    at async Object.connect (ext:deno_net/01_net.js:701:11)
    at async runTestCase (file:///home/rahulrajesh/projects/h1spec/http_test.ts:223:22)
    at async Promise.all (index 8)
    at async runTests (file:///home/rahulrajesh/projects/h1spec/http_test.ts:209:21) {
  name: "ConnectionRefused",
  code: "ECONNREFUSED"
}
Error in test "Fragmented field value 1": ConnectionRefused: Connection refused (os error 111)
    at async Object.connect (ext:deno_net/01_net.js:701:11)
    at async runTestCase (file:///home/rahulrajesh/projects/h1spec/http_test.ts:223:22)
    at async Promise.all (index 9)
    at async runTests (file:///home/rahulrajesh/projects/h1spec/http_test.ts:209:21) {
  name: "ConnectionRefused",
  code: "ECONNREFUSED"
}
Error in test "Fragmented field value 2": ConnectionRefused: Connection refused (os error 111)
    at async Object.connect (ext:deno_net/01_net.js:701:11)
    at async runTestCase (file:///home/rahulrajesh/projects/h1spec/http_test.ts:223:22)
    at async Promise.all (index 10)
    at async runTests (file:///home/rahulrajesh/projects/h1spec/http_test.ts:209:21) {
  name: "ConnectionRefused",
  code: "ECONNREFUSED"
}
Error in test "Fragmented field value 3": ConnectionRefused: Connection refused (os error 111)
    at async Object.connect (ext:deno_net/01_net.js:701:11)
    at async runTestCase (file:///home/rahulrajesh/projects/h1spec/http_test.ts:223:22)
    at async Promise.all (index 11)
    at async runTests (file:///home/rahulrajesh/projects/h1spec/http_test.ts:209:21) {
  name: "ConnectionRefused",
  code: "ECONNREFUSED"
}
Error in test "Fragmented field value 4": ConnectionRefused: Connection refused (os error 111)
    at async Object.connect (ext:deno_net/01_net.js:701:11)
    at async runTestCase (file:///home/rahulrajesh/projects/h1spec/http_test.ts:223:22)
    at async Promise.all (index 12)
    at async runTests (file:///home/rahulrajesh/projects/h1spec/http_test.ts:209:21) {
  name: "ConnectionRefused",
  code: "ECONNREFUSED"
}
Error in test "Fragmented request": ConnectionRefused: Connection refused (os error 111)
    at async Object.connect (ext:deno_net/01_net.js:701:11)
    at async runTestCase (file:///home/rahulrajesh/projects/h1spec/http_test.ts:223:22)
    at async Promise.all (index 13)
    at async runTests (file:///home/rahulrajesh/projects/h1spec/http_test.ts:209:21) {
  name: "ConnectionRefused",
  code: "ECONNREFUSED"
}
Error in test "Fragmented request termination": ConnectionRefused: Connection refused (os error 111)
    at async Object.connect (ext:deno_net/01_net.js:701:11)
    at async runTestCase (file:///home/rahulrajesh/projects/h1spec/http_test.ts:223:22)
    at async Promise.all (index 14)
    at async runTests (file:///home/rahulrajesh/projects/h1spec/http_test.ts:209:21) {
  name: "ConnectionRefused",
  code: "ECONNREFUSED"
}
Error in test "Request without HTTP version": ConnectionRefused: Connection refused (os error 111)
    at async Object.connect (ext:deno_net/01_net.js:701:11)
    at async runTestCase (file:///home/rahulrajesh/projects/h1spec/http_test.ts:223:22)
    at async Promise.all (index 15)
    at async runTests (file:///home/rahulrajesh/projects/h1spec/http_test.ts:209:21) {
  name: "ConnectionRefused",
  code: "ECONNREFUSED"
}
Error in test "Request with Expect header": ConnectionRefused: Connection refused (os error 111)
    at async Object.connect (ext:deno_net/01_net.js:701:11)
    at async runTestCase (file:///home/rahulrajesh/projects/h1spec/http_test.ts:223:22)
    at async Promise.all (index 16)
    at async runTests (file:///home/rahulrajesh/projects/h1spec/http_test.ts:209:21) {
  name: "ConnectionRefused",
  code: "ECONNREFUSED"
}
Error in test "Valid GET request": ConnectionRefused: Connection refused (os error 111)
    at async Object.connect (ext:deno_net/01_net.js:701:11)
    at async runTestCase (file:///home/rahulrajesh/projects/h1spec/http_test.ts:223:22)
    at async Promise.all (index 17)
    at async runTests (file:///home/rahulrajesh/projects/h1spec/http_test.ts:209:21) {
  name: "ConnectionRefused",
  code: "ECONNREFUSED"
}
Error in test "Valid GET request with edge cases": ConnectionRefused: Connection refused (os error 111)
    at async Object.connect (ext:deno_net/01_net.js:701:11)
    at async runTestCase (file:///home/rahulrajesh/projects/h1spec/http_test.ts:223:22)
    at async Promise.all (index 18)
    at async runTests (file:///home/rahulrajesh/projects/h1spec/http_test.ts:209:21) {
  name: "ConnectionRefused",
  code: "ECONNREFUSED"
}
Error in test "Invalid header characters": ConnectionRefused: Connection refused (os error 111)
    at async Object.connect (ext:deno_net/01_net.js:701:11)
    at async runTestCase (file:///home/rahulrajesh/projects/h1spec/http_test.ts:223:22)
    at async Promise.all (index 19)
    at async runTests (file:///home/rahulrajesh/projects/h1spec/http_test.ts:209:21) {
  name: "ConnectionRefused",
  code: "ECONNREFUSED"
}
Error in test "Missing Host header": ConnectionRefused: Connection refused (os error 111)
    at async Object.connect (ext:deno_net/01_net.js:701:11)
    at async runTestCase (file:///home/rahulrajesh/projects/h1spec/http_test.ts:223:22)
    at async Promise.all (index 20)
    at async runTests (file:///home/rahulrajesh/projects/h1spec/http_test.ts:209:21) {
  name: "ConnectionRefused",
  code: "ECONNREFUSED"
}
Error in test "Multiple Host headers": ConnectionRefused: Connection refused (os error 111)
    at async Object.connect (ext:deno_net/01_net.js:701:11)
    at async runTestCase (file:///home/rahulrajesh/projects/h1spec/http_test.ts:223:22)
    at async Promise.all (index 21)
    at async runTests (file:///home/rahulrajesh/projects/h1spec/http_test.ts:209:21) {
  name: "ConnectionRefused",
  code: "ECONNREFUSED"
}
Error in test "Overflowing negative Content-Length header": ConnectionRefused: Connection refused (os error 111)
    at async Object.connect (ext:deno_net/01_net.js:701:11)
    at async runTestCase (file:///home/rahulrajesh/projects/h1spec/http_test.ts:223:22)
    at async Promise.all (index 22)
    at async runTests (file:///home/rahulrajesh/projects/h1spec/http_test.ts:209:21) {
  name: "ConnectionRefused",
  code: "ECONNREFUSED"
}
Error in test "Negative Content-Length header": ConnectionRefused: Connection refused (os error 111)
    at async Object.connect (ext:deno_net/01_net.js:701:11)
    at async runTestCase (file:///home/rahulrajesh/projects/h1spec/http_test.ts:223:22)
    at async Promise.all (index 23)
    at async runTests (file:///home/rahulrajesh/projects/h1spec/http_test.ts:209:21) {
  name: "ConnectionRefused",
  code: "ECONNREFUSED"
}
Error in test "Non-numeric Content-Length header": ConnectionRefused: Connection refused (os error 111)
    at async Object.connect (ext:deno_net/01_net.js:701:11)
    at async runTestCase (file:///home/rahulrajesh/projects/h1spec/http_test.ts:223:22)
    at async Promise.all (index 24)
    at async runTests (file:///home/rahulrajesh/projects/h1spec/http_test.ts:209:21) {
  name: "ConnectionRefused",
  code: "ECONNREFUSED"
}
Error in test "Empty header value": ConnectionRefused: Connection refused (os error 111)
    at async Object.connect (ext:deno_net/01_net.js:701:11)
    at async runTestCase (file:///home/rahulrajesh/projects/h1spec/http_test.ts:223:22)
    at async Promise.all (index 25)
    at async runTests (file:///home/rahulrajesh/projects/h1spec/http_test.ts:209:21) {
  name: "ConnectionRefused",
  code: "ECONNREFUSED"
}
Error in test "Header containing invalid control character": ConnectionRefused: Connection refused (os error 111)
    at async Object.connect (ext:deno_net/01_net.js:701:11)
    at async runTestCase (file:///home/rahulrajesh/projects/h1spec/http_test.ts:223:22)
    at async Promise.all (index 26)
    at async runTests (file:///home/rahulrajesh/projects/h1spec/http_test.ts:209:21) {
  name: "ConnectionRefused",
  code: "ECONNREFUSED"
}
Error in test "Invalid HTTP version": ConnectionRefused: Connection refused (os error 111)
    at async Object.connect (ext:deno_net/01_net.js:701:11)
    at async runTestCase (file:///home/rahulrajesh/projects/h1spec/http_test.ts:223:22)
    at async Promise.all (index 27)
    at async runTests (file:///home/rahulrajesh/projects/h1spec/http_test.ts:209:21) {
  name: "ConnectionRefused",
  code: "ECONNREFUSED"
}
Error in test "Invalid prefix of request": ConnectionRefused: Connection refused (os error 111)
    at async Object.connect (ext:deno_net/01_net.js:701:11)
    at async runTestCase (file:///home/rahulrajesh/projects/h1spec/http_test.ts:223:22)
    at async Promise.all (index 28)
    at async runTests (file:///home/rahulrajesh/projects/h1spec/http_test.ts:209:21) {
  name: "ConnectionRefused",
  code: "ECONNREFUSED"
}
Error in test "Invalid line ending": ConnectionRefused: Connection refused (os error 111)
    at async Object.connect (ext:deno_net/01_net.js:701:11)
    at async runTestCase (file:///home/rahulrajesh/projects/h1spec/http_test.ts:223:22)
    at async Promise.all (index 29)
    at async runTests (file:///home/rahulrajesh/projects/h1spec/http_test.ts:209:21) {
  name: "ConnectionRefused",
  code: "ECONNREFUSED"
}
Error in test "Valid POST request with body": ConnectionRefused: Connection refused (os error 111)
    at async Object.connect (ext:deno_net/01_net.js:701:11)
    at async runTestCase (file:///home/rahulrajesh/projects/h1spec/http_test.ts:223:22)
    at async Promise.all (index 30)
    at async runTests (file:///home/rahulrajesh/projects/h1spec/http_test.ts:209:21) {
  name: "ConnectionRefused",
  code: "ECONNREFUSED"
}
Error in test "Chunked Transfer-Encoding": ConnectionRefused: Connection refused (os error 111)
    at async Object.connect (ext:deno_net/01_net.js:701:11)
    at async runTestCase (file:///home/rahulrajesh/projects/h1spec/http_test.ts:223:22)
    at async Promise.all (index 31)
    at async runTests (file:///home/rahulrajesh/projects/h1spec/http_test.ts:209:21) {
  name: "ConnectionRefused",
  code: "ECONNREFUSED"
}
Error in test "Conflicting Transfer-Encoding and Content-Length in varying case": ConnectionRefused: Connection refused (os error 111)
    at async Object.connect (ext:deno_net/01_net.js:701:11)
    at async runTestCase (file:///home/rahulrajesh/projects/h1spec/http_test.ts:223:22)
    at async Promise.all (index 32)
    at async runTests (file:///home/rahulrajesh/projects/h1spec/http_test.ts:209:21) {
  name: "ConnectionRefused",
  code: "ECONNREFUSED"
}

0 out of 33 tests passed.
rahulrajesh@fedora:~/projects/h1spec$ 
```

```
$ deno run --allow-net http_test.ts 127.0.0.1 8000
✅ Fragmented method: Server waited successfully
✅ Fragmented URL 1: Server waited successfully
✅ Fragmented URL 2: Server waited successfully
✅ Fragmented URL 3: Server waited successfully
✅ Fragmented HTTP version: Server waited successfully
✅ Fragmented request line: Server waited successfully
✅ Fragmented request line newline 1: Server waited successfully
✅ Fragmented request line newline 2: Server waited successfully
✅ Fragmented field name: Server waited successfully
✅ Fragmented field value 1: Server waited successfully
✅ Fragmented field value 2: Server waited successfully
✅ Fragmented field value 3: Server waited successfully
✅ Fragmented field value 4: Server waited successfully
✅ Fragmented request: Server waited successfully
✅ Fragmented request termination: Server waited successfully
❌ Request without HTTP version: Read operation timed out
❌ Request with Expect header: Read operation timed out
❌ Valid GET request: Read operation timed out
❌ Valid GET request with edge cases: Read operation timed out
❌ Invalid header characters: Read operation timed out
❌ Missing Host header: Read operation timed out
❌ Multiple Host headers: Read operation timed out
❌ Overflowing negative Content-Length header: Read operation timed out
❌ Negative Content-Length header: Read operation timed out
❌ Non-numeric Content-Length header: Read operation timed out
❌ Empty header value: Read operation timed out
❌ Header containing invalid control character: Read operation timed out
❌ Invalid HTTP version: Read operation timed out
❌ Invalid prefix of request: Read operation timed out
❌ Invalid line ending: Read operation timed out
❌ Valid POST request with body: Read operation timed out
❌ Chunked Transfer-Encoding: Read operation timed out
❌ Conflicting Transfer-Encoding and Content-Length in varying case: Read operation timed out

15 out of 33 tests passed.
```

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Use "127.0.0.1" instead of "localhost" host argument #2

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Use "127.0.0.1" instead of "localhost" host argument #2

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