title: ELMAH log how to ignore error by type
body: <p>Hello I have setup ELMAH in my project, but I am getting a lot errors like</p>
  
  <blockquote>
    <p>System.Web.HttpException: A potentially dangerous Request.Path value
    was detected from the client (:).</p>
    
    <p>Generated: Sun, 26 May 2013 21:46:30 GMT</p>
    
    <p>System.Web.HttpException (0x80004005): A potentially dangerous
    Request.Path value was detected from the client (:).    at
    System.Web.HttpRequest.ValidateInputIfRequiredByConfig()    at
    System.Web.HttpApplication.PipelineStepManager.ValidateHelper(HttpContext
    context)</p>
  </blockquote>
  
  <p>I would like to ignore them, and don't send to my mail but write in ELMAH DB.
  Is it possible to do ?</p>