mod_atom: Update to the new mod_pep
This takes advantage of the many improvements to PEP added to Prosody
recently. Such as support for multiple items and access control.
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summary: Storage benchmark tool
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To benchmark `mod_storage_internal`:
prosodyctl mod_benchmark_storage internal
Does a number (aprox. 10000) of reads and writes and to the selected
storage driver and tells you how long it took.