title: Allow access when certain query string exists otherwise deny
body: <p>I want to allow access to my site when there is <code>s=stick_path</code> or <code>s=stick_relative</code> in the query string otherwise deny the access. e.g allow access when <code>www.domain.com/?s=stick_path</code> but deny access when <code>www.domain.com/?s=ck_relative</code> or <code>www.domain.com/?s=action_path</code>.</p>
  <p>I have tried for simple example like <code>www.domain.com/?s=stick_path</code> but it does not seem to work.</p>
  <pre><code>RewriteCond %{QUERY_STRING} !^s=stick_path$
  RewriteRule ^.* - [F,L]
  </code></pre>
  <p>I think one can trick the <code>.htaccess</code> rule if s parameter is present twice like <code>www.domain.com/?s=stick_path&amp;s=action_path</code></p>