Validate parsed WebSocketFrame to ensure it was sent as per protocol specifications

[gacardinal]

Sometimes, it's possible that the WebSocket frame parser will 'successfully' parse a frame but that the frame may not be valid. For instance, passing a buffer byte[] buff = new byte[2] {0x0, 0x0} will not fail but it is obviously invalid.

Using a contract or assertion library for this may be a good idea.

This should probably be implemented as a static method along with the SocketFrame.TryParse() and SocketFrame.Unmask() methods.

[shelbyyyyy]

@Gaboik Is this still relevant? If not, please delete/close the issue. :)