This addresses three issues:

[1]  Adding/removing an allowed sasl mechanism from a preexisting list requires a restart to take effect
[2]  Restarting the server twice causes the allowed sasl mech list to get truncated
[3]  Crash when using sasl PLAIN mechanism

https://pagure.io/389-ds-base/issue/49379

https://pagure.io/389-ds-base/issue/raw/files/888f686d3c35ab4c7e960e45b2f5e4fbf27ad08e62e3ae47e1b896ff3bd59e54-0001-Ticket-49379-Allowed-sasl-mapping-requires-restart.patch