Document support for retained messages (MQTT)
Document support for retained messages (MQTT)

References rabbitmq/rabbitmq-mqtt#16.

vivekanand1101/rabbitmq-website,Lartza/rabbitmq-website,gotthardp/rabbitmq-website,rabbitmq/rabbitmq-website,lyrixx/rabbitmq-website,multikatt/rabbitmq-website,AlexandrT/rabbitmq-website,gotthardp/rabbitmq-website,bogdando/rabbitmq-website,AlexandrT/rabbitmq-website,gotthardp/rabbitmq-website,rabbitmq/rabbitmq-website,rabbitmq/rabbitmq-website,lyrixx/rabbitmq-website,vivekanand1101/rabbitmq-website,vivekanand1101/rabbitmq-website,AlexandrT/rabbitmq-website,bogdando/rabbitmq-website,mverrilli/rabbitmq-website,gotthardp/rabbitmq-website,AlexandrT/rabbitmq-website,Lartza/rabbitmq-website,AlexandrT/rabbitmq-website,vivekanand1101/rabbitmq-website,Lartza/rabbitmq-website,gotthardp/rabbitmq-website,gotthardp/rabbitmq-website,bogdando/rabbitmq-website,vivekanand1101/rabbitmq-website,mverrilli/rabbitmq-website,lyrixx/rabbitmq-website,Lartza/rabbitmq-website,multikatt/rabbitmq-website,mverrilli/rabbitmq-website,Lartza/rabbitmq-website,Lartza/rabbitmq-website,lyrixx/rabbitmq-website,mverrilli/rabbitmq-website,AlexandrT/rabbitmq-website,bogdando/rabbitmq-website,multikatt/rabbitmq-website,multikatt/rabbitmq-website,lyrixx/rabbitmq-website,mverrilli/rabbitmq-website,lyrixx/rabbitmq-website,bogdando/rabbitmq-website,multikatt/rabbitmq-website,rabbitmq/rabbitmq-website,vivekanand1101/rabbitmq-website,bogdando/rabbitmq-website,rabbitmq/rabbitmq-website,mverrilli/rabbitmq-website,multikatt/rabbitmq-website