HURD: Why is remote process not killed?

On most UNIX systems this will not leave a process running:

ssh example.net sleep 1000
<<CTRL-C>>

I have tested this behaviour on aix

centos
debian
dragonfly
freebsd
hpux
irix
mandriva
miros
netbsd
openbsd
openindiana
qnx
redhat
scosysv
solaris-x86
solaris
suse
tru64
ubuntu
unixware

They all clean up as expected. On HURD the login shell is killed as expected, but the sleep is left running as a child of init. Why? And can it be mitigated?

$ uname -a
GNU hurd 0.5 GNU-Mach 1.4-486/Hurd-0.5 i686-AT386 GNU