This error condition is defined within stream errors, however,
XEP-0198 says:
> This element SHOULD contain an error condition, which MUST
> be one of the **stanza** error conditions defined in RFC 6120.
* oom_watermark: 1..100
Start OOM watchdog only when system memory usage exceeds
this value in percents. When the usage drops below the value,
OOM watchdog is stopped. The default is 80 (percents).
Note that once OOM watchdog is started, it performs full garbage
collection periodically: this can be seen as spikes in CPU
utilization and drops in RAM usage. If your system is permanently
above the watermark, it may cause significant CPU overhead.
* oom_queue: positive integer
Only trigger OOM killer when total amount of messages in all queues
of all Erlang processes is above this value. The default is 10000.
Note that this value only takes effect when `oom_killer` is set
to `true` (this is the default). Otherwise, only a warning will
be logged.
Set the 'include_body' option to a static text by default. Some app
servers check for the presence of a 'last-message-body' field to
distinguish between notifications generated for actual chat messages and
notifications triggered by other types of traffic.
The result returned by connected_users_info command has changed,
and is now similar to the result of user_sessions_info.
Notice that num_active_users and process_rosteritems still require Mnesia.
The header consisted of too many unrelated stuff and macros misuse.
Some stuff is moved into scram.hrl and type_compat.hrl.
All macros have been replaced with the corresponding function calls.
TODO: probably type_compat.hrl is not even needed anymore since
we support only Erlang >= OTP 17.5
Don't include a urn:xmpp:push:summary form in push notifications that
are triggered by outgoing messages. App servers might use the form
fields to generate user-visible notifications directly (as opposed to
just waking the client app). This is usually not desired for outgoing
messages.
If the 'include_sender' and/or 'include_body' options are specified,
also include a urn:xmpp:push:summary form in push notifications that are
generated for carbon-copied messages (with a body).
