mod_sasl2_fast: Restore non-FAST SASL handler upon reset This fixes an issue where, after failed FAST authentication, the FAST handler was still used (even though the client now wants to try with a password or other non-FAST credentials). A little hacky perhaps, but probably the best we can do without baking FAST support directly into mod_sasl2.

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summary: Log a message once per minute
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This module sends `-- MARK --` to the log once per minute. This may be
useful to give a sense of how busy the server is or see that logging and
timers are still working.