Support freevoipdeal for sending SMS

Please add support for www.freevoipdeal.com for sending SMS. This is one of the Dellmont brands, of which there are many. I have no tie to this company, but I guess they are silently one of the biggest in the voip market. I have been using this company for years.

I tested this code - it works.
Using vagrant for development makes it so easy!

For the future, maybe the phpservermon could be extended to allow adding other SMS senders from the Dellmont family easily.