On the inheritable-props branch: Update ra_svn protocol documentation.
On the inheritable-props branch: Update ra_svn protocol documentation.

* subversion/libsvn_ra_svn/protocol: Document inherited-props capability and
  get-iprop command.



git-svn-id: ae8f6d14bbdc7ff690355f143f05114066724748@1326829 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion