title: custom regex for baserev for jfrog layout
body: <p><a href="https://www.jfrog.com/confluence/display/RTF/Repository+Layouts#RepositoryLayouts-PathPatternTokens" rel="nofollow noreferrer">https://www.jfrog.com/confluence/display/RTF/Repository+Layouts#RepositoryLayouts-PathPatternTokens</a></p>
  
  <p>baserev seems to be required, but doesn't support regex? Is there a way I can use a custom token for the baserev instead?</p>