Receive optional loadInfo keys from LDAP

[maxpower9000]

Issue

In my project, I need additional keys from LDAP. The returned LDAP keys are hardcoded to the
predefined key-value-pairs as in UserInfoLoader. See code below or at UserInfoLoader:28

class UserInfoLoader extends BaseHandler
{
	public function __construct($loadInfo = NULL)
	{
		$this->loadInfo = is_array($loadInfo) ? $loadInfo : array(
			// Useful attributes
			'givenName' => 'firstName',
			'sn' => 'lastName',
			'name' => 'fullName',
                        // (more default attributes here ...)

			'initials' => 'initials',  // <-- more key(s) needed for my project
		);

Idea

Why not override or extend the $loadInfo on instantiation, so the contructor
either merges or overrides the defaults with the user defined key-value-pairs.
For example: pass the user parameters into Authenticator:88

$this->userInfoLoader = new UserInfoLoader( /* user input here */ );

Thank you for your great work!