Zabbix

..F....... [ZBX-17663] fixed user not being redirected back to an URL he was coming from before signing in using SAML SSO

* commit '5ac98ae054fb783e6cf898099990b5bb30d54fe9':
  ..F....... [ZBX-17663] fixed Zabbix session not being terminated before initiating SLO process
  ..F....... [ZBX-17663] fixed early redirect to RelayState; improved code style
  .D........ [ZBX-17663] added ChangeLog file
  ..F....... [ZBX-17663] fixed user not being redirected back to an URL he was coming from before signing in using SAML SSO

(cherry picked from commit a1ddc59d1a130de510510c9c2ebc4410f41d85fb)