mod_sasl2_fast: Fix harmless off-by-one error (invalidates existing tokens!) Problem: This was causing the key to become "<token>--cur" instead of the expected "<token>-cur". As the same key was used by the code to both set and get, it still worked. Rationale for change: Although it worked, it's unintended, inconsistent and messy. It increases the chances of future bugs due to the unexpected format. Side-effects of change: Existing '--cur' entries will not be checked after this change, and therefore existing FAST clients will fail to authenticate until they attempt password auth and obtain a new FAST token. Existing '--cur' entries in storage will not be cleaned up by this commit, but this is considered a minor issue, and okay for the relatively few FAST deployments.

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summary: Prevent unaffiliated MUC participants from sending PMs
---

# Introduction

This module prevents unaffiliated users from sending private messages in
chat rooms, unless someone with an affiliation (member, admin etc)
messages them first.

# Configuration

The module doesn't have any options, just load it onto a MUC component.

``` lua
Component "muc"
modules_enabled = {
    "muc_block_pm";
}
```

# Compatibility

    Branch State
  -------- -----------------
       0.9 Works
      0.10 Should work
      0.11 Should work