title: "else if" in janino logback configuration
body: <p>I am trying to use janino conditional statements in logback configuration and it is working fine with "if" and "else". But I want to ask if there is it possible to write "else if" in it?</p>
  
  <p>My case - </p>
  
  <pre class="lang-xml prettyprint-override"><code>&lt;if condition='p("log.environment").equals("prod")'&gt;
      &lt;then&gt;
          &lt;include file="${LOG_CONFIG_DIR}/logback-prod.xml" /&gt;
      &lt;/then&gt;
  &lt;/if&gt;
  
  &lt;if condition='p("log.environment").equals("uat")'&gt;
      &lt;then&gt;
          &lt;include file="${LOG_CONFIG_DIR}/logback-uat.xml" /&gt;
      &lt;/then&gt;
  &lt;/if&gt;
  
  &lt;if condition='p("log.environment").equals("dev")'&gt;
      &lt;then&gt;
          &lt;include file="${LOG_CONFIG_DIR}/logback-dev.xml" /&gt;
      &lt;/then&gt;
  &lt;/if&gt;
  </code></pre>