title: What is the meaning of colon, underscore and star in lift's SiteMap(entries:_*)?
body: <p>I'm learning <a href="http://www.scala-lang.org/" rel="noreferrer">Scala</a> and <a href="http://liftweb.com" rel="noreferrer">lift</a> at the same time and I got stuck on understanding the syntax used to inintialize the <a href="http://wiki.liftweb.net/index.php/SiteMap" rel="noreferrer">SiteMap</a> in the Boot.scala:</p>
  
  <pre><code> val entries = Menu(Loc("Home", "/", "Home")) :: 
         Menu(Loc("Foo", "/badger", "Foo")) ::
         Menu(Loc("Directory Foo", "/something/foo", "Directory Foo")) :: Nil 
   LiftRules.setSiteMap(SiteMap(entries:_*))
  </code></pre>
  
  <p>What exactly is the meaning of the SiteMap parameter?
  I see that the value <em>entries</em> is a list of Menu. What is the <strong>colon, underscore, star</strong>?
  At first I thought it is a method on the List, but I am unable to find such definition...</p>