fixedftp_upload uses wrong timeout
Bug with change to use a dynamic timeout based on the size of a tar.gz file.
Caused backup tar.gz files larger than 1 gig to throw an error:
ftp_upload.php exit code: 1
ftp_upload.php output: Could not fdopen: Invalid argument.
ncftpput: cannot open 18.104.22.168: fdopen for writing failed.
ncftpput return code: 1