http://debian-amd64.alioth.debian.org/debian-amd64 does not exist.

[Sanzo Miyazawa <miyazawa@smlab.sci.gunma-u.ac.jp>]

Although I could see /http://debian-amd64.alioth.debian.org/debian-amd64
yesterday, now /http://debian-amd64.alioth.debian.org/debian-amd64 has 
disappeared.

Is there a trouble or is this an intentional change?

/http://debian-amd64.alioth.debian.org/archive-structure.txt indicates

/debian-amd64		- Structure with amd64 specific sources and
			  arch:amd64 packages. Normal sources and
			  arch:all packages are referenced from
			  /debian and /debian musst reside next to
			  this on any mirror.