mod_sasl2_bind2, mod_sasl2_sm: Remove bind2 <features/> wrapper element
This was dropped from the spec. It's more consistent with SASL2.
# About
This module allows using the [mod_csi_simple][doc:modules:mod_csi_simple]
setting `csi_important_payloads` (added in trunk/0.12) in Prosody 0.11.x.
# Config
```
modules_enabled = {
-- other modules etc
"csi_simple",
"csi_simple_compat",
}
csi_important_payloads = {
-- Anything in this namespace:
"{urn:example:important-namespace}",
-- Specific element name and namespace:
"{urn:example:xmpp:priority}super-important",
}
```
# Example
``` lua
csi_important_payloads = {
-- XEP-0353: Jingle Message Initiation
"{urn:xmpp:jingle-message:0}",
}
```