Update IDPList docs for recent improvements

docs/simplesamlphp-reference-sp-remote.md

@@ -359,13 +359,9 @@ Only relevant if you are a proxy/bridge and wants to limit the idps this
 sp can use.
 
 `IDPList`
-: The list of scoped idps ie. the list of entityids for idps that are
-relevant for this sp. The final list is the concatenation of the list
-given as parameter to InitSSO (at the sp), the list configured at the
-sp and the list configured at the ipd (here) for this sp. The intersection
-of the final list and the idps configured at the at this idp will be
-presented to the user at the discovery service if neccessary. If only one
-idp is in the intersection the discoveryservice will go directly to the idp.
+: The list of scoped IdPs, i.e. the list of entityids for IdPs that are
+relevant for this SP. It will override any list set in the IdP's
+metadata.
 
 **Example: Configuration for scoping**
 

modules/saml/docs/sp.md

@@ -48,6 +48,9 @@ All these parameters override the equivalent option from the configuration.
 `isPassive`
 :   Send a passive authentication request.
 
+`IDPList`
+:   List of IdP entity ids that should be sent in the AuthnRequest to the IdP in the IDPList element, part of the
+    Scoping element.
 
 `saml:Extensions`
 :   The samlp:Extensions (an XML chunk) that will be sent in the login request.