void
rdataFromString(Tokenizer st, Name origin) throws IOException {
	footprint = st.getUInt16();
	alg = st.getUInt8();
	digestid = st.getUInt8();
	digest = st.getHex();
}
Creates a DLV Record from the given data
@param footprint The original KEY record's footprint (keyid).
@param alg The original key algorithm.
@param digestid The digest id code.
@param digest A hash of the original key.
src/main/java/core/org/xbill/DNS/DLVRecord.java