mod_cloud_notify: Don't notify for all smacks queued stanzas in a row Only send out a notification for the first unnotified stanza in the smacks queue, not for all queued stanzas in a row. Several notifications in the same second are useless and just cause server load on both ends.

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summary: Allow server administrators to probe any user
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This module lets server administrators send `<presence type="probe"/>`
to any local user and receive their presence in response, bypassing
roster checks.