Check_MK Werk 5482: Add option to specify a timeperiod for notification bulking

ID: 5482 Title: Add option to specify a timeperiod for notification bulking Component: Notifications Level: 1 Class: New feature Version: 1.5.0i2 The option "Bulking period" can be used in notification rules to specify a time period for which notifications should always be bulked. After the timeperiod has ended the notifications of the bulk will be sent. This option is useful if e.g. after the working hours no notifications should be sent.