To coder.ua[at]gmail.com:
Please note some errors have more than one constants:
[CURLE_FTP_PARTIAL_FILE] 18
[CURLE_PARTIAL_FILE] 18
[CURLE_HTTP_NOT_FOUND] 22
[CURLE_HTTP_RETURNED_ERROR] 22
[CURLE_OPERATION_TIMEDOUT] 28
[CURLE_OPERATION_TIMEOUTED] 28
[CURLE_BAD_DOWNLOAD_RESUME] 36
[CURLE_FTP_BAD_DOWNLOAD_RESUME] 36