code: @Nonnull
    public static String getURIWithServerAndContext (@Nonnull final String sHRef)
    {
      // If known protocol, keep it
      if (hasKnownProtocol (sHRef))
        return sHRef;
  
      final IRequestWebScopeWithoutResponse aRequestScope = WebScopeManager.getRequestScope ();
      final String sContextPath = aRequestScope.getContextPath ();
      return aRequestScope.getFullServerPath () + _getURIWithContext (sContextPath, sHRef);
    }
docs: Prefix the passed href with the absolute server + context path in case the
  passed href has no protocol yet.<br>
  Important: this method does not add the session ID in case cookies are
  disabled by the client!
  
  @param sHRef
  The href to be extended. May not be <code>null</code>.
  @return Either the original href if already absolute or
  <code>http://servername:8123/webapp-context/<i>href</i></code>
  otherwise. Never <code>null</code>.