u-boot tarball downloads via https

[Chris Packham]

Hi Tom, Wolfgang,

Today I found myself in need of a u-boot source tarball (usually I
just use git).

I notice the link on http://www.denx.de/wiki/U-Boot/SourceCode points
to ftp://ftp.denx.de/pub/u-boot/ but it appears that the same content
is available via https://ftp.denx.de/pub/u-boot/

I know some browsers are moving towards dropping support for ftp and
there are all kinds of good reasons to be using https. Since it seems
to already work would it be possible to get the link on the denx page
updated to use https: instead of ftp:

Thanks,
Chris