Attachments with longs names are not being processed

Bug Report

Q	A
Version(s)	2.10.x

Summary

Attachments with filenames, longer than 76 char symbols, are not being processed.

Current behavior

Currently, Laminas\Mail successfully identifies long names and successfully splits them into multiple variables in \Laminas\Mail\Header\ContentDisposition::getFieldValue(). However, the multiple variables do not get recognized in Laminas\Mime\Decode::splitHeaderField() due to this check strcasecmp($name, $wantedPart) i.e. it compares "filename*0" with "filename"

How to reproduce

Try to process an email with an attachment with long name, for example "This___is____long__name.txt"

Expected behavior

It should not compare with strcasecmp, but rather with a regex. Then if it is a multiple value, it should concatenate the values

Suggested fix

    $fullField = [];
    if ($wantedPart) {
        foreach ($matches[1] as $key => $name) {

            if (!preg_match('/' . preg_quote($wantedPart) . "(\*[0-9])*" . '/', $name)) { //support multiname
                continue;
            }

            $val = $matches[2][$key][0] != '"' ? $matches[2][$key] : substr($matches[2][$key], 1, -1);

            // if name and wantedPart doees not match fully(they have matched above in the regex),
            // it means that we have multiple values
            if (strcasecmp($name, $wantedPart) && gettype($val) === 'string') {
                $fullField[$wantedPart] .= $val;
            } else {// name and wantedPart match
                return $val;
            }

        }
        return $fullField[$wantedPart] ?: null;
    }

laminas / laminas-mime