Launch a SAML SLO when session is purged
When LLNG purges sessions, it doesn't take care of SAML. It could be interesting to propose to propagate session deletion through SAML when SOAP SLO is available
In purgeCentralSessions script, look if a SAML token exists and if SOAP-SLO is available, launch a SLO process.
@clement_oudot: is it possible without link to user's browser?