public static int
	value(String s) {
		return services.getValue(s);
	}
Converts a textual representation of a TCP/UDP service into its
port number.  Integers in the range 0..65535 are also accepted.
@param s The textual representation of the service.
@return The port number, or -1 on error.
src/main/java/core/org/xbill/DNS/WKSRecord.java