Things to do (in no particular order):

	o Implement "securenets" (ie, fill in the is_valid_host() function)

	o Implement DNS "hosts" lookup in a better way (separate process,
	  using the raw DNS functions).

	o Implement some way of subclassing YP servers so that one 
	  can include maps from other servers.

	o Fix ypxfr stuff

	o A config file? (/etc/ypserv.conf)

	o Make sure there are no memory leaks

	o Remove all bugs :-)
