Make self-contained optional in http request

[RamanaReddy0M]

Proposed changes

id: CVE-2021-28937

info:
  name: Acexy Wireless-N WiFi Repeater REV 1.0 - Repeater Password Disclosure
  author: geeknik
  severity: high
  description: Acexy Wireless-N WiFi Repeater REV 1.0 is vulnerable to password disclosure because the password.html page of the web management interface contains the administrator account password in plaintext.
  metadata:
    max-request: 1
    vendor: acexy
    product: wireless-n_wifi_repeater_firmware
  tags: cve2021,cve,acexy,disclosure,iot
  
http:
  - method: GET
    path:
      - "{{BaseURL}}/password.html"
    matchers-condition: and
    matchers:
      - type: word
        words:
          - "Password Setting"
          - "addCfg('username'"
          - "addCfg('newpass'"
        condition: and

      - type: status
        status:
          - 200

Currently this template is not validating without self-contained property under http.

Expected that template needs to validate without self-contained under http block.

Ref: https://github.com/projectdiscovery/nuclei/blob/dev/nuclei-jsonschema.json#L917

Checklist

• Pull request is created against the dev branch
• All checks passed (lint, unit/integration/regression tests etc.) with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)