Bug#819092: win32-loader cannot load dailies (therefore can't setup non-stable arches) because NSISdl doesn't support https
As the title says, win32-loader currently can't download dailies, as
d-i.debian.org has moved to enforced https.
That's a limitation of the NSISdl NSIS builtin plugin. It could be replaced
with the Inetc plugin , but it isn't packaged.
No dailies means no kfreebsd/hurd too, unfortunately.