On the 'issue-2779-dev' branch:  Fix some header comments.
On the 'issue-2779-dev' branch:  Fix some header comments.

* subversion/include/svn_ra.h
  s/svn_ra_open3/svn_ra_open4/ where relevant.

git-svn-id: 07811504b33410bf04d04e799c1aa99a4b2811b0@980612 13f79535-47bb-0310-9956-ffa450edef68

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