Include SSDP.SetUDN

[laercionit]

Hello, I would like to know if it is possible to include the UDN for the SSDP as a parameter.
My code generates a specific UUID, so I analyzed the Lib it is using CHIP to mount the UUID.

[laercionit]

Hello, I made an example, basically check if the UUID was set or not.
If it is informed I assume the value informed, if not informed I maintain the use of the function that generates the UUID based on CHIPID.

I hope you like it and can be incorporated from the master.

SSDP.zip

[devyte]

@laercionit Could you please make a pull request with this for consideration?