If a callback function is not defined by the `Mod` then
a call to code_server process is performed. Under heavy load
this may cause code_server to get overloaded. We now avoid this.
Call Mod:handle_auth_success/4 and Mod:handle_auth_failure/4 before
sending the SASL response rather than afterwards. This way, callbacks
can send a custom response and disconnect.
If set to `true`, all incoming XML packets are fully validated
against known schemas. If an error occurs, the packet will be bounced
with the corresponding error reason. The default value is `false`.
The option might be useful to protect client software from sofisticated
bugs related to XML validation as well as for client developers
who want to catch validation errors at early stage of development.
Note that the option might have slight performance impact, so use it
with care on loaded machines.
ejabberd receivers were meant to serve connections from frontends
to backends. However, this approach was not popular and frontend
related code was removed in previous releases. Now, ejabberd receiver's
code was also removed, making the code shorter and cleaner. Also, in
stress tests ejabberd now handles load more robustly, without
c2s processes overload (even with disabled shapers).
ejabberd_socket.erl is renamed to xmpp_socket.erl: it's supposed to
be finally moved into stand-alone xmpp library.
Evgeniy Khramtsov