Added regress backwards and savvanah support/bugs

git-svn-id: http://svn.savannah.nongnu.org/svn/rdiff-backup@476 2b77aa54-bcbc-44c9-a7ec-4f6cf2b41109

trunk/rdiff-backup/TODO

-Consider adding --datadir option (Jean-Sébastien GOETSCHY)
+Check support/bug reports on Savannah occasionally.
+
+Have regress go backwards to avoid using too much disk space at wrong
+time.  Provide --temp-dir or similar option also.
 
 See if regressing takes too much memory (large directories).
 
+Consider adding --datadir option (Jean-Sébastien GOETSCHY)
+
 write test case for --calculate-statistics
 
 Use ctime to check whether files have been changed.  See message: