code: public RRset []
  findRecords(Name name, int type) {
  	return findRecords(name, type, Credibility.NORMAL);
  }
docs: Looks up credible Records in the Cache (a wrapper around lookupRecords).
  Unlike lookupRecords, this given no indication of why failure occurred.
  @param name The name to look up
  @param type The type to look up
  @return An array of RRsets, or null
  @see Credibility