Improved Path Traversal Detection

What: Enhanced security check now detects paths with 3+ consecutive dots (e.g., ..., ....) as suspicious Windows path patterns.

Why this matters: Attackers sometimes use unusual dot sequences to bypass basic .. filters. While ... isn't standard, blocking it prevents potential exploits in path normalization edge cases.

Details:

• Adds regex check /\.{3,}/ to Windows path validation
• Blocks paths like C:\Users\....\file.txt or path/to/.../folder
• Triggers manual approval prompt: "contains a suspicious Windows path pattern"
• Complements existing checks for reserved names, alternate data streams, and other Windows-specific attacks
• Evidence: Modified function tf2() at line 465855 (renamed from mf2()); new check at line 465867