[paho-dev] MQTT 3.1.1 support for Paho clients

[Ian Craggs <icraggs@xxxxxxxxxxxxxxxxxxxxxxx>]

Hi All,

I have been thinking about the how the Paho clients would support MQTT 
3.1.1 in their interfaces.

1) My first thought was to add a connect option to select a 3.1.1 
connection, with a 3.1 connection being the default for the time being.

2) I've just thought that by default we could attempt a 3.1.1 
connection, and then attempt a 3.1 connection automatically if the first 
failed.  Then application programs would not have to change. There could 
be a connect option to say not to do this if you really didn't want it to.

Which would prefer?  Any other options?

Ian