mod_sasl2, mod_sasl_bind2, mod_sasl2_sm: Bump XEP-0388 namespace
This is the namespace for the proposed update to XEP-0388. I.e. not even
experimental yet... but this is all a work in progress anyway.
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summary: Log a message once per minute
...
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.