code: private Hashtable<?,?> setupBasicProperties(Hashtable<String,Object> env)
  			throws NamingException
  	{
  		return setupBasicProperties(env,this.fullUrl);
  	}
docs: Sets basic LDAP connection properties in env.
  
  @param env
  The LDAP security environment
  @param url
  The LDAP URL
  @param tracing
  LDAP tracing level. Output to System.err
  @param referralType
  Referral type: follow, ignore, or throw
  @param aliasType
  Alias type: finding, searching, etc.
  @throws NamingException
  Thrown if the passed in values are invalid