code: function findUserInList(username, list) {
  	var len;
  	if(list) {
  		len = list.length;
  		while(len-- && list[len].split(':')[0] !== username) {
  			// empty
  		}
  		return len;
  	}
  	return -1;
  }
docs: ----------------------------------------------------------------------------- Private Methods ----------------------------------------------------------------------------- 
  Finds the index of username in an Array of htpasswd lines
  @param username {String}
  @param list {Array}