Thanks, but this made the line too long and... I think we can do better than just fixing the name since "Please see the curl_easy_setopt(3) man page for callbacks returning this structure" is also incorrect. It is primarily documented in the CURLOPT_CHUNK_BGN_FUNCTION.3 man page.
I propose we replace the entire comment block there with something like:
/* Information about a single file, used when doing FTP wildcard matching */