Support for RFC 1123 hostname validation

[Maxk-Intezer]

🚀 Feature Request

Please consider adding support for validating hostnames against RFC 1123, which defines valid DNS hostnames. This would be helpful for use cases where strict compliance is needed (e.g., infrastructure tools, domain name validation, security filters).

✅ RFC 1123 Requirements Summary

RFC 1123 hostnames must:

• Only include letters (A–Z, a–z), digits (0–9), and hyphens (-)
• Not begin or end with a hyphen
• Be ≤ 253 characters total
• Have each label ≤ 63 characters
• Cannot contain underscores or other special characters