Updated Zipkin Properties with Javadocs

spring-cloud-sleuth-zipkin/src/main/java/org/springframework/cloud/sleuth/zipkin/ZipkinProperties.java

@@ -33,9 +33,21 @@ public class ZipkinProperties {
 	 *  service discovery (e.g. http://zipkinserver/)
 	 */
 	private String baseUrl = "http://localhost:9411/";
+	/**
+	 * Enables sending spans to Zipkin
+	 */
 	private boolean enabled = true;
+	/**
+	 * Interval in seconds in which spans will be sent in batches to Zipkin
+	 */
 	private int flushInterval = 1;
+	/**
+	 * Encoding type of spans sent to Zipkin
+	 */
 	private Encoding encoding = Encoding.JSON;
+	/**
+	 * Configuration related to compressions of spans sent to Zipkin
+	 */
 	private Compression compression = new Compression();
 
 	private Service service = new Service();
@@ -127,6 +139,11 @@ public class ZipkinProperties {
 		}
 	}
 
+	/** Configuration related to locating of the host name from service discovery.
+	 *  This property is NOT related to finding Zipkin via Service Disovery.
+	 *  To do so use the {@link ZipkinProperties#baseUrl} property with the
+	 *  service name set inside the URL.
+	 */
 	public static class Locator {
 
 		private Discovery discovery;