[arch-general] Pacman 4 XferCommand and 404 errors

[Alex Ferrando]

Using an XferCommand in pacman.conf causes a bunch of 404 errors while 
downloading databases complaining about testing/core/extra.db.sig not 
found, but it doesn't do the same if it's using the default download 
method without an XferCommand.

An example of that:

:: Synchronising package databases...
--2011-10-17 20:36:18--  
http://mirror.devnu11.net/archlinux/testing/os/x86_64/testing.db
Resolving mirror.devnu11.net... 78.46.68.28
Connecting to mirror.devnu11.net|78.46.68.28|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 35855 (35K) [application/octet-stream]
Saving to: `/var/lib/pacman/sync/testing.db.part'
100%[========================================================================================================================================================>] 
35,855       197K/s   in 0.2s
2011-10-17 20:36:18 (197 KB/s) - `/var/lib/pacman/sync/testing.db.part' 
saved [35855/35855]
--2011-10-17 20:36:18--  
http://mirror.devnu11.net/archlinux/testing/os/x86_64/testing.db.sig
Resolving mirror.devnu11.net... 78.46.68.28
Connecting to mirror.devnu11.net|78.46.68.28|:80... connected.
HTTP request sent, awaiting response... 404 Not Found
2011-10-17 20:36:18 ERROR 404: Not Found.

A more complete example in [1]

Found similar troubles with curl or aria2, and as said before nothing 
without XferCommands.

It might seem quite obvious because the files that the downloaders 
complain about doesn't exist in the mirrors. However, this seems odd to 
me and after searching the ML and BBS I found nothing about it.

[1] http://pastie.org/2713149