Fix calculation X-SVN-VR-Base request header in ra_serf.
Fix calculation X-SVN-VR-Base request header in ra_serf.

This commit reverts r1142065 and r1143089.

* subversion/libsvn_ra_serf/update.c
  (report_dir_t): Remove repos_relpath.
  (report_context_t): Remove root_is_switched.
  (start_report): Do not update repos_relpath.
  (end_report): Use only wcprops as source for delta base. Our current 
   protocol doesn't gives us stable way to construct delta base without 
   wcprops. We can optimize it later.
  (link_path): Do not update switched_paths hash and root_is_switched flag.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1143860 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion