title: How to add new SP to PingFederate
body: <p>I want to deploy 2 Web Applications and 1 IDP.
  I call SP1, SP2 and IDP.</p>
  
  <p>I look on agentless kit example
  when SP1 need login, it wil redirect to /sp/startSSO.ping?PartnerIdpId=PF-DEMO and PF will redirect to IDP 
  When I finish login IDP will redirect to /idp/startSSO.ping?PartnerSpId=PF-DEMO
  PF will redirect back to SP by lookup URL from [Application Integration Settings -> Default URLs]</p>
  
  <p>If request come from SP2 how to mapping URL to redirect back to SP2?
  How IDP know what request come from which SP? </p>