GitLab

* Use authForce method to know if authentication should be forced
* Use a common method to store replay protection data
* Use _utime in relaystate state
* Let Lasso choose the defaut transport and binding for requests

* Purge CGI::Session dependency (LA)

* Manage SSO message like SLO message
* Send SLO request trough REDIRECT and POST
* Reponse to SSO request trough REDIRECT, POST and SOAP
* Reponse to SLO request trough REDIRECT, POST and SOAP

* Use new configuration keys
* sum up replay protection code

move metadatas structures of manager into to _Struct and try to generalize display layouts of metadatas in template

store IDP values into samlIDPMetaDataXML and samlIDPMetaDataExportedAttributes, as what has been done with virtualhosts

* Send correct logout request
* Use getMetaDataURL to get URL from metadata configuration keys