I think you missed the line:
The OPENBSD_4_7 tag contains the release sources and errata already applied.
in: http://openbsd.org/anoncvs.html#starting
which would explain the failure to apply patches which are already
applied.
--
Dennis Davis, BUCS, University of Bath, Bath, BA2 7AY, UK
D.H.Davis@bath.ac.uk Phone: +44 1225 386101