Revert "scripts: fix for curl timeout"

This reverts commit 3c52aa25.

The reverted commit made FTP downloads more efficient using the curl optionv --ftp-method singlecwd.

https://curl.se/docs/manpage.html#--ftp-method

According to the commit message, it solved some timeout issue, but it unclear which specific package download the fix was for. Given that it is not clear whether the patch is needed at all, FTP is only used very sparingly these days and HTTP mirrors are available, it is better to revert it rather than maintaining this as a downstream patch when it is most likely no longer needed.

Signed-off-by: Andreas Gnau andreas.gnau@iopsys.eu