return all matching rattrs if specified.  for example, 
	minooka; ndb/query sys kibbiee
	ip=205.185.197.14 ip=205.185.197.15 ip=205.185.197.16 sys=kibbiee ether=0030488b57c2 dom=kibbiee.coraid.com bootf=/386/9pxeload4 console=sukhoi 
	minooka; ndb/query sys kibbiee ip
	205.185.197.14
	205.185.197.15
	205.185.197.16
	minooka; /n/dump/2007/0718/386/bin/ndb/query sys kibbiee ip
	205.185.197.14