Add methods for client options builder
Add methods for client options builder

chkr1011/MQTTnet,chkr1011/MQTTnet,JTrotta/MQTTnet,chkr1011/MQTTnet,JTrotta/MQTTnet,chkr1011/MQTTnet,JTrotta/MQTTnet,JTrotta/MQTTnet,chkr1011/MQTTnet