[bp/r48029 & r48030]
[FIX] svn: In svn 1.8 the entries dir no longer exists, so check for .svn readable as that's all we need
[FIX] svn: Check for .svn/entries before trying to open it. Logic could done be better but committing minimally now for backporting


git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/11.x@48031 b456876b-0849-0410-b77d-98878d47e9d5