Fix: 1 security vulnerabilities in reverseip.py

[adithyan-ak]

Security Fixes\n\nThis PR fixes 1 security vulnerabilities:\n\n- vuln_bc318e0b43a34dafaa74def34c7957af: Added validation of the host parameter to ensure it is either a valid IP address or a valid domain name before making the HTTP request. Used the ipaddress module for IP validation and a regex for domain validation. If validation fails, the function prints an error and returns early, preventing SSRF.\n\n---\nGenerated by ByteArmor