Vintage: add support for shortened avatar age display

indra/newview/skins/vintage/xui/en/panel_profile_secondlife.xml

@@ -68,7 +68,11 @@
     name="no_group_text"
     value="None" />
   <string
-    name="age_format">
+    name="age_format_short">
+    Birthdate: [REG_DATE]
+  </string>
+  <string
+    name="age_format_full">
     Birthdate: [REG_DATE]
 ([AGE])
   </string>
@@ -763,6 +767,19 @@
     layout="topleft"
     visible="false" />
 
+  <check_box
+    name="hide_sl_age"
+    label="Show full birthdate"
+    tool_tip="Let people see your SL age"
+    enabled="false"
+    bottom="-28"
+    left="230"
+    height="16"
+    width="130"
+    follows="left|bottom"
+    layout="topleft"
+    visible="false" />
+
   <button
     name="save_description_changes"
     label="Save"