Abstract some common code into helper functions.
Abstract some common code into helper functions.

* subversion/libsvn_ra_serf/update.c
  (open_updated_file, close_updated_file): New helper functions with
    code abstracted from ...
  (handle_fetch, handle_propchange_only, local_fetch): ... these
    rather similarly-purposed functions (which now employ the new helper
    functions).

Suggested by: gstein

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion