Major reworking of ypserv.c by me: this program actually works now!!

Major reworking of ypserv.c by me: this program actually works now!!
highlights:
 - fixed yp first call (uses ypreq_nokey rather than ypreq_key, despite
			what yp.x says)
 - cleanup of looging
 - removed SVCXPRT args to "local" since you can get them from svc_req
	and this makes it look more like rpcgen's output
 - use new yplog()
 - add call to db init