e.g.MYSQL_AUDIT_GENERAL_ERROR
General audit API (MYSQL_AUDIT_GENERAL_CLASS) didn't expose event
subclass to plugins.
This patch exposes event subclass to plugins via
struct mysql_event_general::event_subclass.
This change is not compatible with existing general audit plugins.
Audit interface major version has been incremented.
WL#3771
"Audit Plugin Interface"
Implement new plug-in type - AUDIT
New plug-in: audit_null
simply increments counter for how many times it was called.
