Correction of the MQTT Topic

[helderfmf]

Remove the forward slash "/" from the beginning of the mqtt topic. https://www.hivemq.com/blog/mqtt-essentials-part-5-mqtt-topics-best-practices/ Never use a leading forward slash A leading forward slash is permitted in MQTT. For example, /myhome/groundfloor/livingroom. However, the leading forward slash introduces an unnecessary topic level with a zero character at the front. The zero does not provide any benefit and often leads to confusion.

Its a breaking change, but its more natural to look in the mqtt explorer:

[vk2him]

Thanks for adding this - you're right that it's a better method and I should have done it this way initially. Since it's a breaking change with no real benefit other than looking nicer in a mqtt explorer type view, I'd rather not add it into the base which would unnecessarily inconvenience everyone. Cheers