FTP file paths in URLs are login-dir-relative in Texis version 6.
For example, the URL ftp://ftp.acme.org/dir/subdir/file will be
obtained with the FTP command GET dir/subdir/file, not GET
/dir/subdir/file as in previous versions. For most FTP URLs that are
accessed with an anonymous chrooted user, this makes no
difference. But for non-chrooted accounts (such as real
users), this allows fetching of files from user home directories
without having to specify them in the URL. An absolute path can still
be given by escaping the slash in the URL,
e.g. ftp://ftp.acme.org/%2Fdir/subdir/file.
The version 5 behavior (absolute paths) may be restored with <urlcp ftprelativepaths off> (here) in scripts.