public static int
	value(String s) {
		return types.getValue(s);
	}
Converts a textual representation of an certificate type into its
numeric code.  Integers in the range 0..65535 are also accepted.
@param s The textual representation of the algorithm
@return The algorithm code, or -1 on error.
src/main/java/core/org/xbill/DNS/CERTRecord.java