title: Commit to VisualSVN fails auth rejected
body: <p>I have trouble making commits to a subversion repository powered by VisualSVN server.
  I can checkout code and update, so the username and password I am using is correct.
  However, when I am trying to make a commit, I get consistent Authorization failures.
  I have tried non-interactive, interactive, command line, svnX, Versions, all with the same result.</p>
  
  <pre><code>svn: Commit failed (details follow):
  svn: MKACTIVITY of 'xxxxxx/4a1e3c7e-8efd-47f0-abf6-80239ee625c8': authorization failed: Could not authenticate to server: rejected Basic challenge
  </code></pre>
  
  <p>The repository is obviously running under https.</p>
  
  <p>I have been using other SVN repositories from the command line for years, and never had this problem. I have read many posts about this issue, but they all had issues with the authentication being locally stored by subversion being invalid, I cleared those caches, but nothing.</p>
  
  <p>Especially since checkout and updates work, I am stumped.
  I can also log in into the Windows server that VisualSVN server is running on with the same credentials. </p>
  
  <p>VisualSVN server version is 2.5.1
  svn version 1.6.17 (r1128011) running on OSX</p>
  
  <p>Any help would be greatly appreciated.</p>