update-rbos: support specific SVN revisions

git-svn-id: https://rebeccablackos.svn.sourceforge.net/svnroot/rebeccablackos@3183 56e3d1a8-0179-4092-b3e2-9fbbcda0c0a9
Don't background kbuildsysoca5

git-svn-id: https://rebeccablackos.svn.sourceforge.net/svnroot/rebeccablackos@3184 56e3d1a8-0179-4092-b3e2-9fbbcda0c0a9
make the user logs append

git-svn-id: https://rebeccablackos.svn.sourceforge.net/svnroot/rebeccablackos@3185 56e3d1a8-0179-4092-b3e2-9fbbcda0c0a9
waylandloginmanager: _export_ the WAYLAND_DISPLAY

git-svn-id: https://rebeccablackos.svn.sourceforge.net/svnroot/rebeccablackos@3186 56e3d1a8-0179-4092-b3e2-9fbbcda0c0a9