mod_http_index: Hide http apps that haven't set a title by default This setting was meant to default to this but by some mistake defaulted to true. Apps that haven't set a title might not be meant to be user facing, so hiding them makes sense.

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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.