Add variable smb_tls_chain for the Certificate Chain

ad-server/templates/smb.conf.j2

@@ -19,7 +19,8 @@
         kdc:renewal lifetime = {{ renewal_lifetime }}
 
         tls enabled = yes
-        tls cafile = /etc/ssl/certs/rwth_chain.pem
+        tls cafile = {{smb_tls_chain}}
+        #tls cafile = /etc/ssl/certs/rwth_chain.pem
         tls keyfile = {{smb_tls_key}}
         tls certfile = {{smb_tls_cert}}