[dns-operations] "zx85.cn ." random sub-domain attacks.

[David]

I'm sure this has been noticed else where already, but there has a been 
a random sub-domain attack against zx85.cn\032. off and on today which 
has caused a considerable increase in traffic towards the root servers.

Oddly enough they were using the correct name earlier, and appears to 
have done the same on Jan 6th.

While we see lots of these normally we don't often see them misdirected 
so badly.