SimpleSAML_Utilities: Add writeFile(), for atomically creating a file.
SimpleSAML_Utilities: Add writeFile(), for atomically creating a file.

sitya/saml2,madmatt/saml2,newmen/saml2,ArtemTeleshev/php-saml2,cb8/saml2,sgomez/saml2,simplesamlphp/saml2