saml2: Generate stable persistent NameID values.
saml2: Generate stable persistent NameID values.

Patch by jon.prettyman <http://code.google.com/u/jon.prettyman/>.
tectronics/simplesamlphp,tectronics/simplesamlphp,vivekrajenderan/simplesamlphp,tectronics/simplesamlphp,vivekrajenderan/simplesamlphp,vivekrajenderan/simplesamlphp,tectronics/simplesamlphp,vivekrajenderan/simplesamlphp,tectronics/simplesamlphp,vivekrajenderan/simplesamlphp