title: Mercurial: How to ignore changes to a tracked file
body: <p>I have a file with database settings in my project which I have set to some defaults. The file is tracked by Mercurial and checked in. Since this file will be edited with different values various developer machines, is there a way I can tell Mercurial to ignore new changes to this file?</p>
  
  <p>I tried adding the file to the <code>.hgignore</code> file, but since the file is tracked it isn't ignored. This is alright and good in other situations, but I am wondering if there is something I can do here?</p>