Add RFC references to EppResource Javadoc

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=136747145

java/google/registry/model/host/HostResource.java

@@ -50,6 +50,8 @@ import org.joda.time.DateTime;
  *
  * <p>A host's {@link TransferData} is stored on the superordinate domain.  Non-subordinate hosts
  * don't carry a full set of TransferData; all they have is lastTransferTime.
+ *
+ * @see <a href="https://tools.ietf.org/html/rfc5732">RFC 5732</a>
  */
 @XmlRootElement(name = "infData")
 @XmlType(propOrder = {