Update to RC2.
 Fix problem installing from package.
 Use DISTVERSION instead of PORTVERSION.
(the port reports now correct version 8.3.r2)
 Enable more 8.3 features:
- Add OPTION for the new XML data type (default: enabled)
- Add OPTION for usage of system timezone data (default: included tzdata)
PR: ports/119770 , ports/119561 
Submitted by: Artis Caune , Martin Matuska