title: Correct analyzer for a field with backslash
body: <p>So, I'm trying to setup a new index mapping with the correct analyzer for a Windows credential field, which has the format <code>domain\username</code>.</p>
  
  <p>I want to be able to search for domain, username AND domain\username. But the default analyzer seems to ignore the backslash (meaning, if I try to search for domain\username it will search for "domain OR username" ignoring the backslash), and if I try the whitespace analyzer it seems to only match on domain\username.</p>
  
  <p>Any tips?</p>