time_duration (relative) is distinct from expiration_time (absolute)

wizard-common/src/main/java/org/cobbzilla/wizard/model/SqlDefaultSearchField.java

@@ -69,7 +69,7 @@ public class SqlDefaultSearchField implements SearchField {
                 case expiration_time:
                     bounds.addAll(asList(SearchField.bindTime(name())));
                     break;
-                case integer: case money_integer:
+                case integer: case money_integer: case time_duration:
                     bounds.addAll(asList(SearchField.bindInteger(name())));
                     break;
                 case decimal: case money_decimal:

wizard-common/src/main/java/org/cobbzilla/wizard/model/entityconfig/EntityFieldType.java

@@ -81,6 +81,9 @@ public enum EntityFieldType {
     /** a date or date/time value, represented as milliseconds since 1/1/1970 */
     expiration_time  (new EntityConfigFieldValidator_integer()),
 
+    /** millisecond value for a time duration */
+    time_duration (new EntityConfigFieldValidator_integer()),
+
     /** a time-zone (for example America/New York) */
     time_zone  (null),