Function all_obfuscations 

pub fn all_obfuscations(
    header_name: &str,
    value: &str,
) -> Vec<(HeaderTechnique, String)>

Apply all header obfuscation techniques to a header name/value pair.

Returns a vector of (technique, obfuscated_header_line) pairs. For DuplicateHeader, the two lines are joined with CRLF.