feat: fixed bug due to parallel auto setting in http

[Ice3man543]

Proposed changes

Closes #4993

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)

[denandz]

If my reading here is correct, this will still cause problems with greater than 10 payloads? I don't think this is a reasonable fix, since there's a condition here where the issue crops up again. We're introducing an edge case where <10 payloads behaves one way, and >10 behaves another way.

A better option might be to detect when variable substitution and an extractor is being used programatically, then turn off auto-concurrency. There's a very simplified version of this logic in the script in issue #4993

[denandz]

Confirmed, with this patch anything that has >NUCLEI_PAYLOAD_AUTO_CONCURRENCY_THRESHOLD payloads will continue to break:

doi@DESKTOP-B49A2DEE:/dev/shm/nuclei-templates$ NUCLEI_PAYLOAD_AUTO_CONCURRENCY_THRESHOLD=2 ~/go/src/github.com/projectdiscovery/nuclei/cmd/nuclei/nuclei -t ./http/default-logins/phpmyadmin/phpmyadmin-default-login.yaml -u http://127.0.0.1:8081/ 

                     __     _
   ____  __  _______/ /__  (_)
  / __ \/ / / / ___/ / _ \/ /
 / / / / /_/ / /__/ /  __/ /
/_/ /_/\__,_/\___/_/\___/_/   v3.2.3

		projectdiscovery.io

[INF] Current nuclei version: v3.2.3 (latest)
[INF] Current nuclei-templates version: v9.8.0 (latest)
[WRN] Scan results upload to cloud is disabled.
[INF] New templates added in latest release: 85
[INF] Templates loaded for current scan: 1
[INF] Executing 1 signed templates from projectdiscovery/nuclei-templates
[INF] Targets loaded for current scan: 1
[INF] No results found. Better luck next time!
doi@DESKTOP-B49A2DEE:/dev/shm/nuclei-templates$ ~/go/src/github.com/projectdiscovery/nuclei/cmd/nuclei/nuclei -t ./http/default-logins/phpmyadmin/phpmyadmin-default-login.yaml -u http://127.0.0.1:8081/ 

                     __     _
   ____  __  _______/ /__  (_)
  / __ \/ / / / ___/ / _ \/ /
 / / / / /_/ / /__/ /  __/ /
/_/ /_/\__,_/\___/_/\___/_/   v3.2.3

		projectdiscovery.io

[INF] Current nuclei version: v3.2.3 (latest)
[INF] Current nuclei-templates version: v9.8.0 (latest)
[WRN] Scan results upload to cloud is disabled.
[INF] New templates added in latest release: 85
[INF] Templates loaded for current scan: 1
[INF] Executing 1 signed templates from projectdiscovery/nuclei-templates
[INF] Targets loaded for current scan: 1
[phpmyadmin-default-login] [http] [high] http://127.0.0.1:8081/index.php [password="root",user="root"]

[ehsandeep]

Merging this as hotfix to be included in release!