test: check that --insecure-http-parser works

[sam-github]

Test that using --insecure-http-parser will disable validation of
invalid characters in HTTP headers.

See:

• http: llhttp opt-in insecure HTTP header parsing #30567

Checklist

• make -j4 test (UNIX), or vcbuild test (Windows) passes
• tests and/or benchmarks are included
• commit message follows commit guidelines

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/28273/

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/28275/

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/28281/

[sam-github]

Note that the test fails when the required CLI param is not present:

% NODE_SKIP_FLAG_CHECK=y ~/.nvm/versions/node/v12.14.0/bin/node test/parallel/test-http-insecure-parser.js          
assert.js:92
  throw new AssertionError(obj);
  ^

AssertionError [ERR_ASSERTION]: Expected values to be strictly equal:
+ actual - expected

+ 'HTTP/1.1 400 Bad Request'
- 'HTTP/1.1 200 OK'
            ^
    at Socket.<anonymous> (/home/sam/w/core/node/test/parallel/test-http-insecure-parser.js:32:12)
    at Socket.<anonymous> (/home/sam/w/core/node/test/common/index.js:358:15)
    at Socket.emit (events.js:215:7)
    at endReadableNT (_stream_readable.js:1184:12)
    at processTicksAndRejections (internal/process/task_queues.js:80:21) {
  generatedMessage: true,
  code: 'ERR_ASSERTION',
  actual: 'HTTP/1.1 400 Bad Request',
  expected: 'HTTP/1.1 200 OK',
  operator: 'strictEqual'
}

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/28302/

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/28326/

[sam-github]

@addaleax @nodejs/http

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/28328/

[sam-github]

Landed in e4bff13