Merge branch 'feature/pdometadata' of https://github.com/tdiscuit/simplesamlphp into tdiscuit-feature/pdometadata

Allow to specify which metadata sets to use in metarefresh. Can be configured either per set or per source.

* bug/issue230:
  No data about previous authentication is stored if authentication was not started at the SP (IdP-first flow). That makes the replay protection measures fail, leading to an ugly exception show to the user. Fix that.

  Additionally, give precedence to the RelayState configured in the local metadata, as the one received together with the SAML response may not even be an URL.

  This resolves #230.

add attributes from skolfederation.se/SIS

SimpleSAMLphp no longer requires mcrypt, it will only be needed depending on the configuration, so mark it as optional.

No data about previous authentication is stored if authentication was not started at the SP (IdP-first flow). That makes the replay protection measures fail, leading to an ugly exception show to the user. Fix that.

Additionally, give precedence to the RelayState configured in the local metadata, as the one received together with the SAML response may not even be an URL.

This resolves #230.

Reimplement \SimpleSAML\Utils\Crypto::aesDecrypt() and \SimpleSAML\Utils\Crypto::aesEncrypt() to use openssl instead of mcrypt. This removes the direct dependency on mcrypt and closes #228.

Generate the instance ID from the configuration itself instead of the spl_object_id of the configuration class

Update config.php

Fix typo (reccomended -> recommended)

$t - not grep-safe, used in 3rd party libs for other things
$template - only used for templates last I checked

Harbinger of things to come...

Move the aes[En|De]crypt() functionality in \SimpleSAML\Utils\Crypto to internal methods where the secret is passed as a parameter. Then we don't need a working configuration to test the functionality.

Created a central database class and updated the PDO MetaDataStorangeHandler to use it instead of its own database classes