openid: Fix cross-site scripting.
openid: Fix cross-site scripting.

Can be exploited by a malicious openid provider to execute scripts
on the host using openid.

git-svn-id: a243b28a2a52d65555a829a95c8c333076d39ae1@2444 44740490-163a-0410-bde0-09ae8108e29a

simplesamlphp/simplesamlphp-module-openid,simplesamlphp/simplesamlphp-module-openid