Couple fixes for 'walmgr restore' from -stable:
Couple fixes for 'walmgr restore' from -stable:

- Make sure pg_tblspc exists, 8.3 seems to require it
- Copy config files/symlinks from old data dir over

Original patch by Zoltán Böszörményi, applied with minor rework

mpihlak/skytools-dev,ssinger/skytools-cvs,mpihlak/skytools-dev,mpihlak/skytools-dev,ssinger/skytools-cvs,ssinger/skytools-cvs