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.

# Introduction

This module adds newly registered users as members to a specified MUC
room and sends them an invite. In a way, this is similar in purpose to
[mod_support_contact] and [mod_default_bookmarks].

# Example

    VirtualHost"example.com"
        modules_enabled = { "support_room" }
        support_room = "room@muc.example.com"
        support_room_inviter = "support@example.com"
        support_room_reason = "Invite new users to the support room"

    Component "muc.example.com"

# Compatibility

This module

  Version   Works
  --------- -------
  0.11.x    Yes
  0.10.x    No