freebsd stable - Mar 2006 - How to make sshd not log invalid user login attempts?

In 4.x, I can make sshd not log this noise by using the Deny/Allow 
Users/Groups options.  In 6.x, the same configuration doesn't stop the 
logging, so my logs get overrun with thousands of "Failed password for 
invalid user" messages.  What do I need to do to make sshd not log this 
information?