mod_firewall: Load marks from storage on demand rather than at login
This ensures people who don't use marks, or use them infrequently, don't pay
a perf cost on every resource bind.
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summary: Allow server administrators to probe any user
...
This module lets server administrators send `<presence type="probe"/>`
to any local user and receive their presence in response, bypassing
roster checks.
Compatibility
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trunk Doesn't work (uses is_admin)
0.12 Works?
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