Fix listener broadcasting implementation
Fix listener broadcasting implementation

ericgerling/alertmanager,tyrken/alertmanager,tinytub/alertmanager,Aloomaio/alertmanager,tbouvet/alertmanager,tyrken/alertmanager,prometheus/alertmanager,prometheus/alertmanager,MonsantoCo/alertmanager,Kellel/alertmanager,GoogleCloudPlatform/alertmanager,Kellel/alertmanager,brunoqc/alertmanager,pdf/alertmanager,brancz/alertmanager,joehandzik/alertmanager,Aloomaio/alertmanager,tyrken/alertmanager,brunoqc/alertmanager,prometheus/alertmanager,novilabs/alertmanager,brunoqc/alertmanager,novilabs/alertmanager,sarathsp06/alertmanager,pdf/alertmanager,pdf/alertmanager,tyrken/alertmanager,sarathsp06/alertmanager,GoogleCloudPlatform/alertmanager,tinytub/alertmanager,joehandzik/alertmanager,GoogleCloudPlatform/alertmanager,MonsantoCo/alertmanager,joehandzik/alertmanager,ericgerling/alertmanager,prometheus/alertmanager,sarathsp06/alertmanager,brunoqc/alertmanager,MonsantoCo/alertmanager,Kellel/alertmanager,brancz/alertmanager,tinytub/alertmanager,novilabs/alertmanager,MonsantoCo/alertmanager,tbouvet/alertmanager,brancz/alertmanager,ericgerling/alertmanager,brancz/alertmanager,Aloomaio/alertmanager,novilabs/alertmanager,pdf/alertmanager,tbouvet/alertmanager,GoogleCloudPlatform/alertmanager