Start work on some documentation for the various custom reports we use.
Start work on some documentation for the various custom reports we use.

* subversion/libsvn_ra_dav/protocol: Add a new section on our custom report
  formats, and fill in details on a few of them.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@857841 13f79535-47bb-0310-9956-ffa450edef68

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