proposed change to disman & agentx list configuration

Hi -

As mailing list admin, I'm considering accepting the secretariat's
offer to activate Tagged Message Delivery Agent (TMDA - http://tmda.net/)
software in front of the agentx and disman mailing lists. 

Here's a summary of what the effect should be, stolen
from David Black's description posted on the ips list:

   The only effect should be that if you post to the mailing
   list from an email address that is not subscribed to
   any IETF mailing list hosted at ietf.org, you will need
   to respond to a TMDA email challenge before you get
   the email notice that your post has been held for
   administrator approval.

The motivation is to reduce the volume of spam submissions that I,
as list admin, have to wade through and reject every day.  If you
have any objections to this, please let me know.

Randy