mod_pubsub_summary: Use pre-escaped UTF-8 sequence for compat This silences a warning about using the non-existent global 'utf8' each time this line was hit. The utf8 library was introduced in Lua 5.3, so the warning would appear with 5.1 and 5.2.

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labels:
- Statistics
summary: 'Report malloc() stats'
---

Description
===========

This module collects stats from `util.pposix.meminfo` usage and reports using Prosody 0.12 APIs