On the fsx-1.10 branch: Correct the enhanced format check.
On the fsx-1.10 branch: Correct the enhanced format check.

* subversion/libsvn_fs_x/fs_x.c
  (check_format): Don't simply accept any non-experimental format.
                  Correctly report the supported version range.

Found by: danielsh

git-svn-id: 40002ad72c45bcd78a61b73a7ab5afec77c4e304@1672857 13f79535-47bb-0310-9956-ffa450edef68

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