Socket option Dont Fragment not supported on MacOS

[roordaj]

When using the library on MacOS, I get the following error:

Unhandled exception. System.Net.Sockets.SocketException (45): Operation not supported
at System.Net.Sockets.Socket.UpdateStatusAfterSocketErrorAndThrowException(SocketError error, String callerName)
at System.Net.Sockets.Socket.SetSocketOption(SocketOptionLevel optionLevel, SocketOptionName optionName, Int32 optionValue, Boolean silent)
at System.Net.Sockets.Socket.SetSocketOption(SocketOptionLevel optionLevel, SocketOptionName optionName, Int32 optionValue)
at System.Net.Sockets.Socket.set_DontFragment(Boolean value)
at System.Net.Sockets.UdpClient.set_DontFragment(Boolean value)
at System.IO.BACnet.BacnetIpUdpProtocolTransport.Open()
at System.IO.BACnet.BacnetIpUdpProtocolTransport.Start()
at System.IO.BACnet.BacnetClient.Start()

This is because the MacOS socket does not support that option. A solution might be to omit the setting when not specified explicitly in the constructor.

[YarekTyshchenko]

Should be fixed by #116 Can you check with the latest version of the lib?
Duplicate of #115