Added documentation for contactPerson attributes

docs/simplesamlphp-reference-idp-hosted.md

@@ -123,6 +123,37 @@ Common options
     any value in the SP-remote metadata overrides the one configured
     in the IdP metadata.
 
+`contacts`
+:	Specify contacts in addition to the technical contact configured through config/config.php.
+	For example, specifying a support contact:
+
+		'contacts' => array(
+		    array(
+		        'contactType'       => 'support',
+		        'emailAddress'      => 'support@example.org',
+		        'givenName'         => 'John',
+		        'surName'           => 'Doe',
+		        'telephoneNumber'   => '+31(0)12345678',
+		        'company'           => 'Example Inc.',
+		    ),
+		),
+
+:	If you have support for a trust framework that requires extra attributes on the contact person element in your IdP metadata (for example, SIRTFI), you can specify an array of attributes on a contact.
+
+		'contacts' => array(
+		    array(
+		        'contactType'       => 'other',
+		        'emailAddress'      => 'abuse@example.org',
+		        'givenName'         => 'John',
+		        'surName'           => 'Doe',
+		        'telephoneNumber'   => '+31(0)12345678',
+		        'company'           => 'Example Inc.',
+		        'attributes'        => array(
+		            'xmlns:remd'        => 'http://refeds.org/metadata',
+		            'remd:contactType   => 'http://refeds.org/metadata/contactType/security',
+		        ),
+		    ),
+		), 
 
 SAML 2.0 options
 ----------------