Update ExtraInfoDescriptor.java

src/main/java/org/torproject/descriptor/ExtraInfoDescriptor.java

@@ -142,13 +142,13 @@ public interface ExtraInfoDescriptor extends Descriptor {
 
   /**
    * Get the version number in the overload-ratelimits line or
-   * {@code -1L} if no overload-ratelimits line is present.
+   * {@code 0} if no overload-ratelimits line is present.
    *
-   * @return version number or {@code -1L}
+   * @return version number or {@code 0}
    *
    * @since 2.18.0
    */
-  long getOverloadRatelimitsVersion();
+  int getOverloadRatelimitsVersion();
 
   /**
    * Get the server's history exhausted bandwidth as a timestamp of the
@@ -204,11 +204,11 @@ public interface ExtraInfoDescriptor extends Descriptor {
   /**
    * Get the version number in the overload-fd-exhausted line.
    *
-   * @return version or {@code -1L}
+   * @return version or {@code 0}
    *
    * @since 2.18.0
    */
-  long getOverloadFdExhaustedVersion();
+  int getOverloadFdExhaustedVersion();
 
   /**
    * Get the server's  descriptor exhaustion as a timestamp.