Function accept_language_variation 

pub fn accept_language_variation(input: &str) -> String

Generates browser-like Accept-Language header variations.

Useful for Cloudflare bot detection evasion and browser fingerprinting testing.

Examples

use redstr::accept_language_variation;
let lang = "en-US,en;q=0.9";
let result = accept_language_variation(lang);
assert!(result.contains("en"));