title: is it possible to ignore .gitignore rules in subdirectory?
body: <p>I want to ignore all of .gitignore rules in subdirectory except .gitignore rules in root.</p>
  <p>for example:
  I already have <code>.gitignore</code> file in a directory structure <code>/a</code>.</p>
  <p>And also have <code>.gitignore</code> file in <code>/a/b</code>. Assume <code>/a</code> has <code>a.txt</code> and <code>b.txt</code> files.</p>
  <p><code>/a/b</code> has <code>.config</code> file. <code>.gitignore</code> defines <code>.config</code> in <code>/a/b</code>.</p>
  <p><code>.config</code> file will be ignored by <code>.gitignore</code> in <code>/a/b</code>.</p>
  <p>But I really want to track <code>.config</code> file by ignoring rules of <code>.gitignore</code> in subdirectory.</p>
  <p>Is it possible?</p>