public static void
refresh() {
	String s = System.getProperty("dnsjava.options");
	if (s != null) {
		StringTokenizer st = new StringTokenizer(s, ",");
		while (st.hasMoreTokens()) {
			String token = st.nextToken();
			int index = token.indexOf('=');
			if (index == -1)
				set(token);
			else {
				String option = token.substring(0, index);
				String value = token.substring(index + 1);
				set(option, value);
			}
		}
	}
}
Boolean options:<BR>
bindttl - Print TTLs in BIND format<BR>
multiline - Print records in multiline format<BR>
noprintin - Don't print the class of a record if it's IN<BR>
verbose - Turn on general debugging statements<BR>
verbosemsg - Print all messages sent or received by SimpleResolver<BR>
verbosecompression - Print messages related to name compression<BR>
verbosesec - Print messages related to signature verification<BR>
verbosecache - Print messages related to cache lookups<BR>
<BR>
Valued options:<BR>
tsigfudge=n - Sets the default TSIG fudge value (in seconds)<BR>
sig0validity=n - Sets the default SIG(0) validity period (in seconds)<BR>

@author Brian Wellington
src/main/java/core/org/xbill/DNS/Options.java