Changes:
       ZBXNEXT-3101 action.create, action.update: removed support of trigger value condition 5 under the filter→conditions→conditiontype property
       
Changes:
       ZBXNEXT-1262 hostgroup.create, hostgroup.update: added validation for the name field restricting it to NOT contain trailing and leading slashes, several slashes in a row and any asterisks
       
Changes:
       ZBXNEXT-1262 hostprototype.create, hostprototype.update: added validation for the name field in the groupPrototypes property restricting the new host group name to NOT contain trailing and leading slashes, several slashes in a row and any asterisks
       
Changes:
       ZBXNEXT-3277 added a new correlation API introducing new methods correlation.get, correlation.create, correlation.update and correlation.delete
       ZBXNEXT-3201 added a new problem API introducing a new problem.get method
       
Changes:
       ZBXNEXT-3196 added new property maintenance_mode. Possible values: 0 - Don't pause escalation during maintenance periods, 1 - Pause escalation during maintenance periods
       ZBXNEXT-2087 added new field value2 for trigger action filter conditions and two new condition types: 25 - Tag, 26 - Tag value
       ZBXNEXT-3101 added support of a new operation type 11 - send recovery message
       ZBXNEXT-3101 action.get: added a new selectRecoveryOperations option which returns the recovery operations in recoveryOperations property
       ZBXNEXT-3101 action.create, action:update: added a new recovery_operations property
       
Changes:
       ZBXNEXT-178 added support of web scenario import and export
       ZBXNEXT-2087 added support of trigger and trigger prototype tags import and export
       
Bug fixes:
       ZBX-10049 drule.update: fixed validation of optional fields iprange, dchecks and an undefined index name
       
Changes:
       ZBXNEXT-2087 event.get added new option selectTags to retrieve event tags in tags property.
       ZBXNEXT-3201 event.get: added new filtering options for events by applicationids, severities and tags
       ZBXNEXT-104 event.acknowledge: added a new action field
       ZBXNEXT-3277 event.get: added new fields r_eventid, c_eventid and correlationid to standard output
       
Changes:
       ZBXNEXT-821 graph.delete: removed validation that prevented the removal of discovered graphs
       Bug fixes:
       ZBXNEXT-821 graph.create, graph.update: added read-only validation for the flags field
       
Bug fixes:
       ZBXNEXT-821 graphprototype.create, graphprototype.update: added read-only validation for the flags field
       
Changes:
       ZBXNEXT-3277 hostgroup.delete: added validation when deleting a host group, so host group cannot be deleted while it belongs to a correlation condition
       
Changes:
       ZBXNEXT-821 item.delete: removed validation that prevented the removal of discovered items
       
Changes:
       ZBXNEXT-3274 added two new optional properties correlation_mode and correlation_tag
       ZBXNEXT-104 added a read-write attribute manual_close. The attribute is read-only for templated triggers and discovered triggers
       ZBXNEXT-2118 added support of recovery_mode and recovery_expression trigger options
       ZBXNEXT-2087 trigger.get added new option selectTags to retrieve trigger tags in tags property
       ZBXNEXT-2087 trigger.create, trigger.update added new property tags
       ZBXNEXT-821 trigger.delete: removed validation that prevented the removal of discovered triggers
       Bug fixes:
       ZBXNEXT-821 trigger.adddependencies, trigger.deletedependencies: added validation preventing to add discovered triggers to regular triggers
       
Changes:
       ZBXNEXT-3274 added two new optional properties correlation_mode and correlation_tag
       ZBXNEXT-104 added a read-write attribute manual_close
       ZBXNEXT-2118 added support of recovery_mode and recovery_expression trigger options
       ZBXNEXT-2087 triggerprototype.get added new option selectTags to retrieve trigger prototype tags in tags property
       ZBXNEXT-2087 triggerprototype.create, triggerprototype.update added new property tags