docs: Add links to MDUI and EntityAttributes metadata extensions from saml20-idp-hosted reference.
docs: Add links to MDUI and EntityAttributes metadata extensions from saml20-idp-hosted reference.

git-svn-id: a243b28a2a52d65555a829a95c8c333076d39ae1@3122 44740490-163a-0410-bde0-09ae8108e29a

jschlyter/simplesamlphp,StudentLifeMarketingAndDesign/simplesamlphp,cwaldbieser/simplesamlphp,StudentLifeMarketingAndDesign/simplesamlphp,sylvainmed/simplesamlphp,maytechnet/simplesamlphp,Kunstmaan/simplesamlphp,gtkrug/simplesamlphp,sitya/simplesamlphp,grnet/simplesamlphp,ghalse/simplesamlphp,BrettMerrick/simplesamlphp,dnmvisser/simplesamlphp,BrettMerrick/simplesamlphp,sylvainmed/simplesamlphp,shoaibali/simplesamlphp,simplesamlphp/simplesamlphp,dzuelke/simplesamlphp,grnet/simplesamlphp,sitya/simplesamlphp,dialogik/simplesamlphp,girgen/simplesamlphp,dialogik/simplesamlphp,girgen/simplesamlphp,girgen/simplesamlphp,ghalse/simplesamlphp,dialogik/simplesamlphp,shoaibali/simplesamlphp,dnmvisser/simplesamlphp,jschlyter/simplesamlphp,cwaldbieser/simplesamlphp,gtkrug/simplesamlphp,sylvainmed/simplesamlphp,grnet/simplesamlphp,simplesamlphp/simplesamlphp,dzuelke/simplesamlphp,dialogik/simplesamlphp,madmatt/simplesamlphp,gtkrug/simplesamlphp,dialogik/simplesamlphp,grnet/simplesamlphp,sitya/simplesamlphp,jschlyter/simplesamlphp,dnmvisser/simplesamlphp,dzuelke/simplesamlphp,shoaibali/simplesamlphp,Kunstmaan/simplesamlphp,maytechnet/simplesamlphp,jschlyter/simplesamlphp,madmatt/simplesamlphp,BrettMerrick/simplesamlphp,dnmvisser/simplesamlphp,cwaldbieser/simplesamlphp,gtkrug/simplesamlphp,ghalse/simplesamlphp,StudentLifeMarketingAndDesign/simplesamlphp,dzuelke/simplesamlphp,sylvainmed/simplesamlphp,cwaldbieser/simplesamlphp,StudentLifeMarketingAndDesign/simplesamlphp,girgen/simplesamlphp,girgen/simplesamlphp,shoaibali/simplesamlphp,madmatt/simplesamlphp,maytechnet/simplesamlphp,maytechnet/simplesamlphp,madmatt/simplesamlphp,Kunstmaan/simplesamlphp,BrettMerrick/simplesamlphp,Kunstmaan/simplesamlphp,simplesamlphp/simplesamlphp,jschlyter/simplesamlphp,simplesamlphp/simplesamlphp,sitya/simplesamlphp,ghalse/simplesamlphp