docs/simplesamlphp-sp: Update link to SP reference.

git-svn-id: https://simplesamlphp.googlecode.com/svn/trunk@1822 44740490-163a-0410-bde0-09ae8108e29a

docs/simplesamlphp-sp.txt

@@ -32,7 +32,7 @@ This is a minimal authsources.php for a SP:
     );
     ?>
 
-For more information about additional options available for the SP, see the [SP hosted reference](https://rnd.feide.no/content/sp-hosted-metadata-reference).
+For more information about additional options available for the SP, see the [`saml:SP` reference](https://rnd.feide.no/content/saml-service-provider-configuration-reference).
 
 
 Adding IdPs to the SP