subversion:
 * bump version to [https://svn.apache.org/repos/asf/subversion/branches/1.8.x/CHANGES 1.8.8]
 * fixes #2385


git-svn-id: file:///var/svn/freetz/trunk@11790 149334a1-2f27-0410-a3b9-fc62619ac1e6