title: svnadmin not creating correct repository version
body: <p>I created an SVN repository with svnadmin 1.7.7, but the repository format is wrong. I end up getting </p>
  
  <pre><code>svnadmin: E165005: Expected repository format '3' or '5'; found format '12'
  </code></pre>
  
  <p>when I try to load the repository.</p>
  
  <pre><code>$ /svr/svn/repositories&gt; ls -l SvnCreateTest
  SvnCreateTest: No such file or directory
  $ /svr/svn/repositories&gt; mkdir SvnCreateTest
  $ /svr/svn/repositories&gt; ../csvn/bin/svnadmin create SvnCreateTest
  $ /svr/svn/repositories&gt; cat SvnCreateTest/format
  5
  $ /svr/svn/repositories&gt; cat SvnCreateTest/db/format
  4
  layout sharded 1000
  $ /svr/svn/repositories&gt; ../csvn/bin/svnadmin --version
  svnadmin, version 1.7.7 (r1393599)
     compiled Oct 16 2012, 19:23:32
  
  Copyright (C) 2012 The Apache Software Foundation.
  This software consists of contributions made by many people; see the NOTICE
  file for more information.
  Subversion is open source software, see http://subversion.apache.org/
  
  The following repository back-end (FS) modules are available:
  
  * fs_fs : Module for working with a plain file (FSFS) repository.
  
  $ /svr/svn/repositories&gt;
  </code></pre>
  
  <p>From what I've read, version 1.7.7 should create a format 12 repository. What am I missing?</p>