- rename the RETURN VALUES section to EXIT STATUS [1]

- convert to .Ex macro
- not bumping a date as this is not a real content change

Approved by:	ru
MFC after:	3 days

usr.sbin/rtsold/rtsold.8

@@ -220,10 +220,8 @@ must be the absolute path from root to the script file, be a regular
 file, and be created by the same owner who runs
 .Nm .
 .El
-.Sh RETURN VALUES
-The
-.Nm
-program exits 0 on success, and >0 on failures.
+.Sh EXIT STATUS
+.Ex -std
 .\"
 .Sh FILES
 .Bl -tag -width /var/run/rtsold.dump -compact