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mod_cloud_notify_encrypted: Ensure body substring remains valid UTF-8 The `body:sub()` call risks splitting the string in the middle of a multi-byte UTF-8 sequence. This should have been caught by util.stanza validation, but that would have caused some havoc, at the very least causing the notification to not be sent. There have been no reports of this happening. Likely because this module isn't widely deployed among users with languages that use many longer UTF-8 sequences. The util.encodings.utf8.valid() function is O(n) where only the last sequence really needs to be checked, but it's in C and expected to be fast.

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labels:
- 'Stage-Beta'
summary: 'XEP-0319 compatibility module'
...

Introduction
============

This module adds [XEP-0319](http://xmpp.org/extensions/xep-0319.html)
idle tags to presence stanzas containing [XEP-0012: Last
Activity](http://xmpp.org/extensions/xep-0012.html) tags for idle
indication (e.g. supported by libpurple clients). It works on outgoing
and incoming presence stanzas.

Install and enable it like any other module. It has no configuration.

Compatibility
=============

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  trunk   Works
  0.9     Works
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