Fix hostmap-crtsh script to correctly parse CT logs and return subdomains

[Sweekar-cmd]

This PR fixes issue #2183.
● Correctly parses JSON returned by crt.sh
● Removes false positives
● Adds strict/non-strict mode
● Ensures only valid subdomains are returned
● Adds my improvements from hostmap script

[nnposter]

This is definitely a good first cut, but it would benefit from a few changes. Please see the individual comments for details.

[Sweekar-cmd]

@nnposter Thank you for the detailed review!I've tried to incorporate all your feedback:

1. Parameter renamed: strict → lax (inverted logic as suggested)
2. Author format: Changed to proper table/list format
3. Subdomain checking: Replaced regex with string comparison to avoid escaping issues
4. Parameter handling: Now accepts true, "true", and "1" as truthy values
5. Documentation: Cleaned while preserving original examples and @output section
6. Default behavior: Strict mode (true subdomains only) when lax unset
7. Optional behavior: lax=true enables broader hostname matching
   The script now correctly filters out false positives like google.com.gr when querying google.com, while maintaining backward compatibility via the lax parameter.
   All requested changes have been addressed. Please let me know if anything else is needed.

[Sweekar-cmd]

Hi @nnposter,
I’ve pushed the latest updates:

• Implemented all requested changes from your review
• lax retrieval and lax_mode calculation moved into action()
• lax_mode passed into query_ctlogs()
• Deduplication preserved (not hostnames[name])
• Precomputed suffix is used for faster subdomain checks
• Removed unnecessary variable duplication
• Cleaned and simplified strict/lax logic as suggested

Restored the TODO block that I accidentally removed earlier

Everything should now match your review requirements.
Please let me know if anything else needs adjustment — happy to fix it!

Thanks again for the guidance.

[nnposter]

I have committed this PR with some minor tweaks as r39310 and credited you in CHANGELOG. Thank you for contributing to Nmap!

[Sweekar-cmd]

@nnposter I can't thank you enough! This was my first time contributing to such a major project, and your detailed feedback made it an incredible learning experience. Seeing my code merged into Nmap feels amazing .Thank you very much for the opportunity and for being such a supportive reviewer. I really appreciate it! 🙏